1947. The Soil and Health. A Study of Organic Agriculture. Devin-Adair, New York.
2010. Down to Earth. PhD thesis, Wageningen University, Wageningen, The Netherlands. Available at Web site http://edepot.wur.nl/135448 (verified November 27, 2012).
1938. Putting soil science to work. Journal of the American Society of Agronomy
LiebhardtW.C. and CotnoirL.
1979. Potassium fertilizer recommendations and changes in potassium soil test values as influenced by additions of potassium. Communications in Soil Science and Plant Analysis
OlsonR.A., AndersonF.N., FrankK.D., GrabouskiP.H., RehmG.W., and ShapiroC.A.
1987. Soil testing interpretations: Sufficiency vs. build-up and maintenance. In Brown J.R. (ed.). Soil Testing: Sampling, Correlation, Calibration, and Interpretation. Soil Science Society of America, Madison, WI. p. 41–52.
1989. The soil bank account and the farmer's bank account. Journal of Production Agriculture
HopkinsC.G. and AumerJ.P.
1915. Potassium from the Soil. Illinois Agricultural Experiment Station Bulletin 182. University of Illinois, Urbana, IL.
1919. Utilizing soil potash by means of intermediary crops. Proceedings of the Society for Promotion of Agricultural Science
1951. Soil potassium. Advances in Agronomy
Srinivasa RaoC., RupaT.R., RaoA.S., and BansalS.K.
2001. Subsoil potassium availability in twenty-two benchmark soil series of India. Communications in Soil Science and Plant Analysis
1946. Where are the new discoveries in soil science leading? I. The physical chemistry of soil–plant relationships. Soil Science Society of America Proceedings
1944. Soil-plant relations I. The quantitative relation of exchangeable potassium to crop yields and to crop response to potash additions. Soil Science
BearF.E. and TothS.J.
1948. Influence of calcium on availability of other soil cations. Soil Science
1987. Soil test interpretations: Basic cation saturation ratios and sufficiency levels. . In Brown J.R. (ed.). Soil Testing: Sampling, Correlation, Calibration, and Interpretation. Soil Science Society of America, Madison, WI. p. 53–64.
KopittkeP.M. and MenziesN.W.
2007. A review of the use of the basic cation saturation ratio and the ‘ideal’ soil. Soil Science Society of America Journal
BrayR.H. and DeTurkE.E.
1938. The release of potassium from non-replaceable forms in Illinois soils. Soil Science Society of America Proceedings
LuebsR.E., StanfordG., and ScottA.D.
1956. Relation of available potassium to soil moisture. Soil Science Society of America Proceedings
MartinH.W. and SparksD.L.
1985. On the behavior of nonexchangeable potassium in soils. Communications in Soil Science and Plant Analysis
MengelK. and UhlenbeckerK.
1993. Determination of available interlayer potassium and its uptake by ryegrass. Soil Science Society of America Journal
1994. Reinventing soil testing for the future. In Havlin J.L. and Jacobsen J.S. (eds). Soil Testing: Prospects for Improving Nutrient Recommendations. Soil Science Society of America Special Publication 40. Soil Science Society of America, Madison, WI. p. 187–201.
1991. Soil K level in relation to K treatment, season of year and soil moisture level. PhD thesis, University of Illinois, Urbana, IL.
WascherH.L., AlexanderJ.D., RayB.W., BeaversA.H., and OdellR.T.
1960. Characteristics of Soils Associated with Glacial Tills in Northeastern Illinois. Illinois Agricultural Experiment Station Bulletin 665. University of Illinois, Urbana, IL.
KnudsenD., PetersonG.A., and PrattP.F.
1982. Lithium, sodium, and potassium. In Page A.L., Miller R.H., and Keeney D.R. (eds). Methods of Soil Analysis. Part 2. Chemical and Microbiological Properties. Agronomy Monograph 9. 2nd ed. American Society of Agronomy and Soil Science Society of America, Madison, WI. p. 225–246.
SuhrN.H. and IngamellsC.O.
1966. Solution technique for analysis of silicates. Analytical Chemistry
VeldeB. and PeckT.
2002. Clay mineral changes in the Morrow experimental plots, University of Illinois. Clays and Clay Minerals
KhanS.A., MulvaneyR.L., EllsworthT.R., and BoastC.W.
2007. The myth of nitrogen fertilization for soil carbon sequestration. Journal of Environmental Quality
FernándezF.G. and HoeftR.G.
2009. Managing soil pH and crop nutrients. In Nafziger E. (ed.) Illinois Agronomy Handbook. 24th ed. University of Illinois, Urbana, IL. p. 91–112.
LeaskW.C. and DaynardT.B.
1973. Dry matter yield, in vitro digestibility, percent protein, and moisture of corn stover following grain maturity. Canadian Journal of Plant Science
KiniryJ.R., WilliamsJ.R., VanderlipR.L., AtwoodJ.D., ReicoskyD.C., MullikenJ., CoxW.J., MascagniH.J.Jr, HollingerS.E., and WieboldW.J.
1997. Evaluation of two maize models for nine U.S. locations. Agronomy Journal
PrinceS.D., HaskettJ., SteiningerM., StrandH., and WrightR.
2001. Net primary production of U.S. Midwest croplands from agricultural harvest yield data. Ecological Applications
TollenaarM., AhmadzadehA., and LeeE.A.
2004. Physiological basis of heterosis for grain yield in maize. Crop Science
2007. Potassium. In Barker A.V. and Pilbeam D.J. (eds). Handbook of Plant Nutrition. Taylor & Francis, Boca Raton, FL. p. 91–120.
2012. Seasonal adjustment of economic time series and multiple regression analysis. Journal of the American Statistical Association
1988. A sharper Bonferroni procedure for multiple tests of significance. Biometrika
1946. Potassium fixation and release in soils occurring under moist and drying conditions. Soil Science Society of America Proceedings
HanwayJ.J., BarberS.A., BrayR.H., CaldwellA.C., FriedM., KurtzL.T., LawtonK., PesekJ.T., PrettyK., ReedM., and SmithF.W.
1962. North Central Regional Potassium Studies III. Field Studies with Corn. Iowa Agricultural Experiment Station Research Bulletin 503. Iowa State University, Ames, IA.
HoskinsonR.L., HessJ.R., and AlessiR.S.
1999. Temporal changes in the spatial variability of soil nutrients. In Stafford J.V. (ed.). Precision Agriculture ‘99. Part 1. Academic Press, Sheffield, England. p. 61–70.
1966. Seasonal changes in the amounts of phosphorus and potassium dissolved from soils by dilute calcium chloride solutions. Journal of Agricultural Science, Cambridge
ChildsF.D. and JencksE.M.
1967. Effect of time and depth of sampling upon soil test results. Agronomy Journal
International Plant Nutrition Institute. 2009. Soil Fertility Shifts in Eastern Canada and the Northeastern USA. International Plant Nutrition Institute, Norcross, GA. Available at Web site http://nane.ipni.net/articles/NANE0047-EN (verified May 25, 2012).
1970. Response of Cotton, Corn, Bermudagrass to Rates of N, P, and K. Alabama Agricultural Experiment Station Circular 181. Auburn University, Auburn, AL.
1981. Effects of 50 years of fertilization with phosphorus and potassium on soil test levels and yields at six locations. Soil Science Society of America Journal
1984. Long-Term Fertility Experiments on Cotton, Corn, Soybeans, Sorghum, and Peanuts, 1929–1982. Alabama Agricultural Experiment Station Bulletin 561. Auburn University, Auburn, AL.
1987. Potassium rate study. In Report of Research Results, Northwestern Illinois Agricultural Research and Demonstration Center. University of Illinois, Urbana, IL. p. 45–48.
EbelharS.A. and VarsaE.C.
1999. Tillage and potassium placement effects on potassium use efficiency in a corn–soybean rotation. In Hoeft R.G. (ed.). 1999 Illinois Fertilizer Conference Proceedings. University of Illinois, Urbana, IL. p. 161–180. Available at Web site http://frec.ifca.com/1999/report13/index.htm (verified August 9, 2012).
LiR.-G. and BarberS.A.
1988. Effect of phosphorus and potassium fertilizer on crop response and soil fertility in a long-term experiment. Fertilizer Research
MallarinoA.P., WebbJ.R., and BlackmerA.M.
1991. Soil test values and grain yields during 14 years of potassium fertilization of corn and soybean. Journal of Production Agriculture
MallarinoA.P., WebbJ.R., and BlackmerA.M.
1991. Corn and soybean yields during 11 years of phosphorus and potassium fertilization on a high-testing soil. Journal of Production Agriculture
VitoshM.L., LucasR.E., and SilvaG.H.
1997. Long-term effects of fertilizer and manure on corn yield, soil carbon, and other soil chemical properties in Michigan. In Paul E.A., Paustian K.A., Elliott E.T. and Cole C.V. (eds). Soil Organic Matter in Temperate Agroecosystems: Long-Term Experiments in North America. CRC Press, Boca Raton, FL. p. 129–139.
RandallG.W., EvansS.D., and IragavarapuT.K.
1997. Long-term P and K applications. II. Effect on corn and soybean yields and plant P and K concentrations. Journal of Production Agriculture
RandallG.W., IragavarapuT.K., and EvansS.D.
1997. Long-term P and K applications: I. Effect on soil test incline and decline rates and critical soil test levels. Journal of Production Agriculture
BrownJ.R., OsburnD.D., RedhageD., and GantzerC.J.
1995. Multi-crop comparisons on Sanborn Fields, Missouri, USA. In Barnett V., Payne R. and Steiner R. (eds). Agricultural Sustainability. Economic, Environmental and Statistical Considerations. John Wiley, Chichester, England. p. 111–132.
OlsonR.A., FrankK.D., GrabouskiP.H., and RehmG.W.
1982. Economic and agronomic impacts of varied philosophies of soil testing. Agronomy Journal
MarkusD.K. and BattleW.R.
1965. Soil and plant responses to long-term fertilization of alfalfa (Medicago sativa L.). Agronomy Journal
1968. Long-term fertility requirements of coastal bermudagrass. I. Potassium. Agronomy Journal
DavisR.L., PattonJ.J., TealR.K., TangY., HumphreysM.T., MosaliJ., GirmaK., LawlesJ.W., MogesS.M., MalapatiA., SiJ., ZhangH., DengS., JohnsonG.V., MullenR.W., and RaunW.R.
2003. Nitrogen balance in the Magruder Plots following 109 years in continuous winter wheat. Journal of Plant Nutrition
GirmaK., HoltzS.L., ArnallD.B., TubañaB.S., and RaunW.R.
2007. The Magruder Plots: Untangling the puzzle. Agronomy Journal
1959. 65 Years of Continuous Wheat. Bulletin B-531. Oklahoma State University, Stillwater, OK.
1973. Potassium supplying power of Groseclose silt loam for corn. Communications in Soil Science and Plant Analysis
ZhangH., WangB., and XuM.
2008. Effects of inorganic fertilizer inputs on grain yields and soil properties in a long-term wheat-corn cropping system in south China. Communications in Soil Science and Plant Analysis
ZhangH.-M., WangB.-R., XuM.-G., and FanT.-L.
2009. Crop yield and soil responses to long-term fertilization on a red soil in southern China. Pedosphere
WangX., HoogmoedW.B., CaiD., PerdokU.D., and OenemaO.
2007. Crop residue, manure and fertilizer in dryland maize under reduced tillage in northern China: II Nutrient balances and soil fertility. Nutrient Cycling in Agroecosystems
WangX., CaiD., HoogmoedW.B., PerdokU.D., and OenemaO.
2007. Crop residue, manure and fertilizer in dryland maize under reduced tillage in northern China: I Grain yields and nutrient use efficiencies. Nutrient Cycling in Agroecosystems
JohnstonA.E. and PoultonP.R.
1977. Yields on the Exhaustion Land and changes in the NPK content of the soils due to cropping and manuring, 1852–1975. In Rothamsted Experimental Station Report for 1976. Part 2. Lawes Agricultural Trust, Harpenden, Herts, England. p. 53–85.
LastP.J., WebbD.J., BuggR.B., BeanK.M.R., DurrantM.J., and JaggardK.W.
1985. Long-term effects of fertilizers at Broom's Barn, 1965–82. In Rothamsted Experimental Station Report for 1984. Part 2. Lawes Agricultural Trust, Harpenden, Herts, England. p. 231–249.
BlakeL., MercikS., KoerschensM., GouldingK.W.T., StempenS., WeigelA., PoultonP.R., and PowlsonD.S.
1999. Potassium content in soil, uptake in plants and the potassium balance in three European long-term field experiments. Plant and Soil
Dam KofoedA. and NemmingO.
1976. Askov 1894: Fertilizers and manure on sandy and loamy soils. Annales Agronomiques
AmbergerA. and GutserR.
1976. Effect of long-term potassium fertilization on crops and potassium dynamics of a brown earth (Weihenstephan). Annales Agronomiques
StumpeH., GarzJ., JohannemannR., and BuchteM.
1989. Einfluß der K-Düngung auf den Ertrag und einige Bodeneigenschaften in einem Dauerversuch auf einer Sandlöß-Braunschwarzerde in Halle. Archiv für Acker- und Pflanzenbau und Bodenkunde
BrarB.S. and PasrichaN.S.
1998. Long-term studies on integrated use of organic and inorganic fertilizers in maize-wheat-cowpea cropping system on alluvial soil of Punjab. In Swarup A., Damodar Reddy D., and Prasad R.N. (eds). Proceedings of a National Workshop on Long-term Soil Fertility Management Integrated Plant Nutrient Supply. Indian Institute of Soil Science, Bhopal, India. p. 154–168.
SharmaS.P., SharmaJ., and SubehiaS.K.
1998. Long-term effects of chemical fertilizers on crop yields, nutrients uptake and soil environment in western Himalayan soils. In Swarup A., Damodar Reddy D., and Prasad R.N. (eds). Proceedings of a National Workshop on Long-term Soil Fertility Management Integrated Plant Nutrient Supply. Indian Institute of Soil Science, Bhopal, India. p. 125–138.
LeeR. and MetsonA.J.
1977. Potassium removal from soil by lucerne over three years and the effect of potassium topdressing. New Zealand Journal of Agricultural Research
1970. Preliminary investigation on the effect of continuous cropping of maize on grain yield and on total nitrogen, available phosphorus and exchangeable potassium on three Nigerian soils. Nigerian Journal of Science
De DattaS.K., GomezK.A., and DescalsotaJ.P.
1988. Changes in yield response to major nutrients and in soil fertility under intensive rice cropping. Soil Science
ÖbornI., EdwardsA.C., and HillierS.
2010. Quantifying uptake rate of potassium from soil in a long-term grass rotation experiment. Plant and Soil
TisdaleS.L., NelsonW.L., and BeatonJ.D.
1985. Soil Fertility and Fertilizers. 4th ed. Macmillan Publishing Company, New York, NY.
CassmanK.G., OlkD.C., BrouderS.M., and RobertsB.A.
1995. The influence of moisture regime, organic matter, and root eco-physiology on the availability and acquisition of potassium: Implications for tropical lowland rice. In Potassium in Asia. Balanced Fertilization to Increase and Sustain Agricultural Production. International Potash Institute, Basel, Switzerland. p. 135–156.
AbelF.A.E. and MagistadO.C.
1935. Conversion of soil potash from the non-replaceable to the replaceable form. Journal of the American Society of Agronomy
ParkerD.R., HendricksG.J., and SparksD.L.
1989. Potassium in Atlantic Coastal Plain soils: II. Crop responses and changes in soil potassium under intensive management. Soil Science Society of America Journal
MengelK., Rahmatullah, and DouH.
1998. Release of potassium from the silt and sand fraction of loess-derived soils. Soil Science
RouseR.D. and BertramsonB.R.
1949. Potassium availability in several Indiana soils: Its nature and methods of evaluation. Soil Science Society of America Proceedings
WoodL.K. and DeTurkE.E.
1941. The absorption of potassium in soils in non-replaceable forms. Soil Science Society of America Proceedings
OliveiraV., LudwickA.E., and BeattyM.T.
1971. Potassium removed from some southern Brazilian soils by exhaustive cropping and chemical extraction methods. Soil Science Society of America Proceedings
1983. An estimate of the uptake of subsurface soil potassium by crops in two long-term experiments. Journal of Agricultural Science, Cambridge
BadraouiM., BloomP.R., and DelmakiA.
1992. Mobilization of non-exchangeable K by ryegrass in five Moroccan soils with and without mica. Plant and Soil
ZubillagaM.M. and ContiM.E.
1996. Availability of exchangeable and non-exchangeable K in Argentine soils with different mineralogy. Zeitschrift für Pflanzenernährung und Bodenkunde
MortlandM.M., LawtonK., and UeharaG.
1958. Fixation and release of potassium by some clay minerals. Soil Science Society of America Proceedings
HinsingerP.H., DufeyJ.E., and JaillardB.
1991. Biological weathering of micas in the rhizosphere as related to potassium absorption by plant roots. In McMichael B.L. and Persson H. (eds) Plant Roots and Their Environment. Elsevier, Amsterdam, The Netherlands. p. 98–105.
HofflandE., KuyperT.W., WallanderH., PlassardC., GorbushinaA.A., HaselwandterK., HolmströmS., LandeweertR., LundströmU.S., RoslingA., SenR., SmitsM.M., van HeesP.A.W., and van BreemenN.
2004. The role of fungi in weathering. Frontiers in Ecology and the Environment
van SchöllL., KuyperT.W., SmitsM.M., LandeweertR., HofflandE., and van BreemenN.
2008. Rock-eating mycorrhizas: Their role in plant nutrition and biogeochemical cycles. Plant and Soil
ArocenaJ.M., VeldeB., and RobertsonS.J.
2012. Weathering of biotite in the presence of arbuscular mycorrhizae in selected agricultural crops. Applied Clay Science
YuanT.L., ZelaznyL.W., and RatanaprasatpornA.
1976. Potassium status of selected Paleudults in the Lower Coastal Plain. Soil Science Society of America Journal
SparksD.L., MartensD.C., and ZelaznyL.W.
1980. Plant uptake and leaching of applied and indigenous potassium in Dothan soils. Agronomy Journal
WoodruffJ.R. and ParksC.L.
1980. Topsoil and subsoil potassium calibration with leaf potassium for fertility rating. Agronomy Journal
1940. The chemical nature of soil potassium in relation to its availability in Illinois soils. PhD thesis, University of Illinois, Urbana, IL.
KuhlmannH., ClaassenN., and WehrmannJ.
1985. A method for determining the K-uptake from subsoil by plants. Plant and Soil
1990. Importance of the subsoil for the K nutrition of crops. Plant and Soil
WitterE. and JohanssonG.
2001. Potassium uptake from the subsoil by green manure crops. Biological Agriculture and Horticulture
JouanyC., ColombB., and BoscM.
1996. Long-term effects of potassium fertilization on yields and fertility status of calcareous soils of south-west France. European Journal of Agronomy
GrimesD.W. and HanwayJ.J.
1967. An evaluation of the availability of K in crop residues. Soil Science Society of America Proceedings
BorisovaN.I., VasinevaL.V., and SemenovY.I.
1984. Use of potassium from straw and green mass of barley, labelled with 40K, by plants. Soviet Agricultural Science
DierolfT.S. and YostR.S.
2000. Stover and potassium management in an upland rice–soybean rotation on an Indonesian Ultisol. Agronomy Journal
RosolemC.A., CalonegoJ.C., and FoloniJ.S.S.
2005. Potassium leaching from millet straw as affected by rainfall and potassium rates. Communications in Soil Science and Plant Analysis
1983. Regulation of ion transport. Annual Review of Plant Physiology
SahaM.N., ChaudhuryJ., SahaA.R., and RayP.K.
1998. Effect of intensive cropping and fertilizer use on soil properties and crop yields in a long-term experiment. In Swarup A., Damodar Reddy D. and Prasad R.N. (eds). Proceedings of a National Workshop on Long-term Soil Fertility Management Integrated Plant Nutrient Supply. Indian Institute of Soil Science, Bhopal, India. p. 215–220.
WalkerM.E., FlowersR.A., HenningR.J., KeislingT.C., and MullinixB.G.
1979. Response of early bunch peanuts to calcium and potassium fertilization. Peanut Science
HartzogD.L. and AdamsJ.F.
1988. Relationship between soil-test P and K and yield response of runner peanuts to fertilizer. Communications in Soil Science and Plant Analysis
RobertsS. and BeatonJ.D.
1988. Potato Use of Phosphorus and Potassium in Sandy Soils. Research Bulletin XB1004. Washington State University, Pullman, WA.
DavenportJ.R. and BentleyE.M.
2001. Does potassium fertilizer form, source, and time of application influence potato yield and quality in the Columbia Basin?
American Journal of Potato Research
1983. Effects of potassium fertilizer and fall harvests on alfalfa grown on the eastern Canadian prairies. Canadian Journal of Soil Science
RowberryR.G. and KetchesonJ.W.
1978. Sources of potassium in potato fertilizer and times of application. Canadian Journal of Plant Science
1977. Yields and nutrient accumulation by determinate soybeans, as affected by applied nutrients. Agronomy Journal
BurmesterC.H. and AdamsF.
1983. Fertilizer requirements for new plantings of tall fescue and white clover on two low-fertility Ultisols. Agronomy Journal
LaughlinW.M., MartinP.F., and SmithG.R.
1973. Potassium rate and source influences on yield and composition of bromegrass forage. Agronomy Journal
BhangooM.S. and AlbrittonD.J.
1972. Effect of fertilizer nitrogen, phosphorus, and potassium on yield and nutrient content of Lee soybeans. Agronomy Journal
MaplesR. and KeoghJ.L.
1974. Fertilization of Cotton with Potassium, Magnesium, and Sulfur on Certain Delta Soils: Alfisols Formed from Mississippi River Valley Alluvium. Arkansas Agricultural Experiment Station Bulletin 787. University of Arkansas, Fayetteville, AR.
RupeJ.C., WidickJ.D., SabbeW.E., RobbinsR.T., and BectonC.B.
2000. Effect of chloride and soybean cultivar on yield and the development of sudden death syndrome, soybean cyst nematode, and southern blight. Plant Disease
CassmanK.G., KerbyT.A., RobertsB.A., BryantD.C., and BrouderS.M.
1989. Differential response of two cotton cultivars to fertilizer and soil potassium. Agronomy Journal
LinquistB.A., ByousE., JonesG., WilliamsJ.F., SixJ., HorwathW., and van KesselC.
2008. Nitrogen and potassium fertility impacts on aggregate sheath spot disease and yields of rice. Plant Production Science
1985. Potassium fertilization of alfalfa grown on a soil high in potassium. Agronomy Journal
AllinsonD.W., GuillardK., RafeyM.M., GrabberJ.H., and DestW.M.
1992. Response of reed canarygrass to nitrogen and potassium fertilization. Journal of Production Agriculture
SvecL.V., AndrewsA.K., and CrittendenH.W.
1976. Soybean (Glycine max (L.) Merr.) yield and disease incidence with potassium fertilization. Communications in Soil Science and Plant Analysis
SartainJ.B., ForbesR.B., and UsherwoodN.R.
1979. Yield response of soybeans to P and K fertilization as correlated with soil extractable and tissue nutritional levels. Communications in Soil Science and Plant Analysis
ElwaliA.M.O. and GaschoG.J.
1983. Sugarcane response to P, K, and DRIS corrective treatments on Florida Histosols. Agronomy Journal
ObrezaT.A. and RhoadsF.M.
1988. Irrigated corn response to soil-test indices and fertilizer nitrogen, phosphorous, potassium, and magnesium. Soil Science Society of America Journal
WelchL.F., AdamsW.E., and CarmonJ.L.
1963. Yield response surfaces, isoquants, and economic fertilizer optima for coastal bermudagrass. Agronomy Journal
WalkerM.E., MorrisH.D., and CarterR.L.
1974. The Effect of Rate and Method of Application of N, P, and K on Yield, Quality and Chemical Composition of Spanish and Runner Peanuts. Georgia Agricultural Experiment Station Research Bulletin 152. University of Georgia, Athens, GA.
ParkerM.B., GaschoG.J., and GainesT.P.
1983. Chloride toxicity of soybeans grown on Atlantic Coast Flatwoods soils. Agronomy Journal
WalkerM.E., GainesT.P., and ParkerM.B.
1989. Potassium, magnesium, and irrigation effects on peanuts grown on two soils. Communications in Soil Science and Plant Analysis
McDoleR.E., StallknechtG.F., DwelleR.B., and PavekJ.J.
1978. Response of four potato varieties to potassium fertilization in a seed growing area of eastern Idaho. American Potato Journal
WelchL.F., JohnsonP.E., McKibbenG.E., BooneL.V., and PendletonJ.W.
1966. Relative efficiency of broadcast versus banded potassium for corn. Agronomy Journal
StiversR.K. and OhlroggeA.J.
1952. Influence of phosphorus and potassium fertilization of two soil types on alfalfa yield, stand, and content of these elements. Agronomy Journal
HanwayJ.J., BarberS.A., BrayR.H., CaldwellA.C., EngelbertL.E., FoxR.L., FriedM., HovlandD., KetchesonJ.W., LaughlinW.M., LawtonK., LippsR.C., OlsonR.A., PesekJ.T., PrettyK., SmithF.W., and StickneyE.M.
1961. North Central Regional Potassium Studies. I. Field Studies with Alfalfa. Iowa Agricultural Experiment Station Research Bulletin 494. Iowa State University, Ames, IA.
SweeneyD.W., MoyerJ.L., JardineD.J., and WhitneyD.A.
2011. Nitrogen, phosphorus, and potassium effects on grain sorghum production and stalk rot following alfalfa and birdsfoot trefoil. Journal of Plant Nutrition
TempletonW.C.Jr and TaylorT.H.
1966. Yield response of a tall fescue-white clover sward to fertilization with nitrogen, phosphorus, and potassium. Agronomy Journal
GaschoG.J., DavisJ.F., FoggR.A., and FrakesM.G.
1969. The effects of potassium carriers and levels of potassium and nitrogen fertilization on the yield and quality of sugar beets. Journal of the American Society of Sugar Beet Technologists
GrissomP. and SpurgeonW.I.
1961. Fertility Practices for Cotton and Corn in the Yazoo-Mississippi Delta. Mississippi State University Agricultural Experiment Station Bulletin 614. Mississippi State University, State College, MS.
1999. Potassium deficiency increases specific leaf weights and leaf glucose levels in field-grown cotton. Agronomy Journal
AdeliA. and VarcoJ.J.
2002. Potassium management effects on cotton yield, nutrition, and soil potassium level. Communications in Soil Science and Plant Analysis
2003. Relationships between insufficient potassium and crop maturity in cotton. Agronomy Journal
WortmannC.S., DobermannA.R., FergusonR.B., HergertG.W., ShapiroC.A., TarkalsonD.D., and WaltersD.T.
2009. High-yielding corn response to applied phosphorus, potassium, and sulfur in Nebraska. Agronomy Journal
1972. Fertilization of Established Alfalfa with Nitrogen and Potassium. New Mexico Agricultural Experiment Station Research Report 240. New Mexico State University, Las Cruces, NM.
NelsonW.L., BurkhartL., and ColwellW.E.
1945. Fruit development, seed quality, chemical composition, and yield of soybeans as affected by potassium and magnesium. Soil Science Society of America Proceedings
GoosR.J., JohnsonB.E., and HolmesB.M.
1987. Effect of potassium chloride fertilization on two barley cultivars differing in common root rot reaction. Canadian Journal of Plant Science
LuekingM.A., JohnsonJ.W., and HimesF.L.
1983. Effects of increasing the rates of potassium and nitrapyrin on nitrogen uptake by corn. Agronomy Journal
HudakC., StehouwerR., and JohnsonJ.
1989. An evaluation of K rate, placement and tillage systems for soybeans. Journal of Fertilizer Issues
RobinsonR.R., RhykerdC.L., and GrossC.F.
1962. Potassium uptake by orchardgrass as affected by time, frequency and rate of potassium fertilization. Agronomy Journal
1985. A comparison of fertilizer recommendations by soil testing program and alfalfa yield response in soils of two associations. Communications in Soil Science and Plant Analysis
GasparP.E., ReevesD.L., SchumacherT.E., and FixenP.E.
1994. Oat cultivar response to potassium chloride on soils testing high in potassium. Agronomy Journal
WittelsH. and SeatzL.F.
1953. Effect of potash fertilization on yield, stalk breakage and mineral composition of corn. Soil Science Society of America Proceedings
Clement-BaileyJ. and GwathmeyC.O.
2007. Potassium effects on partitioning, yield, and earliness of contrasting cotton cultivars. Agronomy Journal
NelsonL.R., KeislingT.C., and RouquetteF.M.Jr
1983. Potassium rates and sources for coastal bermudagrass. Soil Science Society of America Journal
WestermannD.T., TindallT.A., JamesD.W., and HurstR.L.
1994. Nitrogen and potassium fertilization of potatoes: Yield and specific gravity. American Potato Journal
CamperH.M. and LutzJ.A.Jr
1977. Plowsole placement of fertilizer for soybeans and response to tillage of plowsole. Agronomy Journal
JonesG.D., LutzJ.A.Jr, and SmithT.J.
1977. Effects of phosphorus and potassium on soybean nodules and seed yield. Agronomy Journal
1975. Effects of potassium topdressing a low fertility silt loam soil on alfalfa herbage yields and composition and on soil K values. Agronomy Journal
RomingerR.S., SmithD., and PetersonL.A.
1976. Yield and chemical composition of alfalfa as influenced by high rates of K topdressed as KCl and K2SO4
. Agronomy Journal
SmithD. and SmithR.R.
1977. Responses of red clover to increasing rates of topdressed potassium fertilizer. Agronomy Journal
SmithD. and PowellR.D.
1979. Yield of alfalfa as influenced by levels of P and K fertilization. Communications in Soil Science and Plant Analysis
PaniqueE., KellingK.A., SchulteE.E., HeroD.E., StevensonW.R., and JamesR.V.
1997. Potassium rate and source effects on potato yield, quality, and disease interaction. American Potato Journal
FageriaN.K., WrightR.J., BaligarV.C., and CarvalhoJ.R.P.
1990. Upland rice response to potassium fertilization on a Brazilian Oxisol. Fertilizer Research
RosolemC.A. and NakagawaJ.
2001. Residual and annual potassic fertilization for soybeans. Nutrient Cycling in Agroecosystems
CoxF.R. and UribeE.
1992. Management and dynamics of potassium in a humid tropical Ultisol under a rice–cowpea rotation. Agronomy Journal
2000. Phosphorus and potassium fertilization and mineral nutrition of soybean. Interciencia
JekićM., TrpeskiV., and RaimiN.
1998. The effect of KCl and K2SO4 in NPK fertilizers on yield, quality and economical earning by production of potato on alluvium of the Vardar. Macedonian Agricultural Review
GaydouE.M. and ArrivetsJ.
1983. Effects of phosphorus, potassium, dolomite, and nitrogen fertilization on the quality of soybean. Yields, proteins, and lipids. Journal of Agricultural and Food Chemistry
LombinG. and MustafaS.
1981. Potassium response of cotton on some Inceptisols and Oxisols of northern Nigeria. Agronomy Journal
LombinG. and SinghL.
1986. Fertilizer responses of groundnuts (Arachis hypogae L.) under continuous intensive cultivation in the Nigerian savannah. Fertilizer Research
RahmanM.A., ChakravartyD., ShahidullahM., and HossainM.T.
1978. Studies on the effect of nitrogen phosphorus and potassium on the growth, yield and nutrient contents of safflower (Carthamus tinctorius L.). Bangladesh Journal of Scientific and Industrial Research
ChowdhuryM.K.A. and RahmanM.H.
1990. Potash requirement of sugarcane in Gangetic River flood plain soils of Bangladesh. Journal of the Indian Society of Soil Science
BokhtiarS.M., KarimA.J.M.S., HossainK.M., HossainT., and EgashiraK.
2001. Response of radish to varying levels of irrigation water and fertilizer potassium on clay terrace soil of Bangladesh. Communications in Soil Science and Plant Analysis
HymowitzT., JethmalaniS.C., TiwariK.L., and WalkerW.M.
1971. Effect of inoculum, variety, nitrogen, phosphorus, and potassium on yield, protein and oil content of soybeans at Jabalpur, M. P. India. Communications in Soil Science and Plant Analysis
GuptaB.R., PathakR.K., BhanS., and SinghA.
1972. Effect of NPK on yield, nutrient uptake and quality of toria (Brassica campestris Var. Toria T.9). Indian Journal of Agronomy
StilwellT.C., SekhonG.S., and ArscottT.G.
1975. Response to potassium fertilization of three Punjab soils. Indian Journal of Agricultural Science
GrewalJ.S. and SinghS.N.
1980. Effect of potassium nutrition on frost damage and yield of potato plants on alluvial soils of the Punjab (India). Plant and Soil
MehtaS.C., SinghN., MittalS.B., and SinghM.
1991. Response of paddy and wheat to nitrogen and potassium fertilization. Crop Research
1994. Influence of soil and foliar application of potassium on growth, nutrient utilization, yield and quality of sugarcane (Saccharum officinarum L.). New Botanist
SinghK.N. and SharmaD.P.
2001. Response of wheat to nitrogen and potassium in saline soils. Experimental Agriculture
KumarP., PandeyS.K., SinghS.V., RawalS., and KumarD.
2004. Effect of potassium fertilization on processing grade tuber yield and quality parameters in potato (Solanum tuberosum). Indian Journal of Agricultural Science
Moinuddin, SinghK., BansalS.K., and PasrichaN.S.
2004. Influence of graded levels of potassium fertilizer on growth, yield, and economic parameters of potato. Journal of Plant Nutrition
GunartoL., YahyaM., SupadmoH., and BuntanA.
1985. Response of corn to NPK fertilization grown in a latosol in South Salawesi, Indionesia. Communications in Soil Science and Plant Analysis
HanoloW. and PulungM.A.
1994. Effect of P and K fertilizers on growth and yield of pea. Acta Horticulturae
BakhshA., KhattakJ.K., and BhattiA.U.
1986. Comparative effect of potassium chloride and potassium sulfate on the yield and protein content of wheat in three different rotations. Plant and Soil
KhanQ., HimayatullahM.N., KhanN., and ShahZ.
1994. Effect of various levels of potassium on wheat crop. Sarhad Journal of Agriculture
2002. Effects of rate and time of potassium application on cotton yield and quality in Turkey. Journal of Agronomy and Crop Science
NguyenH., SchoenauJ.J., NguyenD., Van ReesK., and BoehmM.
2002. Effects of long-term nitrogen, phosphorus, and potassium fertilization on cassava yield and plant nutrient composition in North Vietnam. Journal of Plant Nutrition
BrennanR.F. and BollandM.D.A.
2007. Influence of potassium and nitrogen fertiliser on yield, oil and protein concentration of canola (Brassica napus L.) grain harvested in south-western Australia. Australian Journal of Experimental Agriculture
1975. Effect of phosphorus, potassium, and calcium on peanuts at Mauke (Cook Islands). New Zealand Journal of Experimental Agriculture
RehmG.W., SorensenR.C., and WieseR.A.
1981. Application of phosphorus, potassium, and zinc to corn grown for grain or silage: Early growth and yield. Soil Science Society of America Journal
HoeftR.G., WalshL.M., and LiegelE.A.
1975. Effect of seed-placed fertilizer on the emergence (germination) of soybeans (Glycine max L.) and snapbeans (Phaseolus vulgaris L.). Communications in Soil Science and Plant Analysis
MascarenhasH.A.A., HiroceR., and BragaN.R.
1976. Cloreto de potassio para a soja. Bragantia
SangoiL., ErnaniP.R., BianchetP., VargasV.P., and PicoliG.J.
2009. Efeito de doses de cloreto de potássio sobre a germinação e o crescimento inicial do milho, em solos com texturas contrastantes. Revista Brasileira de Milho e Sorgo
CurtinD., SteppuhnH., CampbellC.A., and BiederbeckV.O.
1999. Carbon and nitrogen mineralization in soil treated with chloride and phosphate salts. Canadian Journal of Soil Science
RosebergR.J., ChristensenN.W., and JacksonT.L.
1986. Chloride, soil solution osmotic potential, and soil pH effects on nitrification. Soil Science Society of America Journal
SmithD. and PetersonL.A.
1975. Chlorine concentrations in alfalfa herbage and soil with KCl topdressing of a low fertility silt loam soil. Communications in Soil Science and Plant Analysis
HahnB.E., OlsonF.R., and RobertsJ.L.
1942. Influence of potassium chloride on nitrification in Bedford silt loam. Soil Science
GoldenD.C., SivasubramaniamS., SandanamS., and WijedasaM.A.
1984. Inhibitory effects of commercial potassium chloride on the nitrification rates of added ammonium sulphate in an acid red yellow podzolic soil. Tea Quarterly
YountsS.E. and MusgraveR.B.
1958. Chemical composition, nutrient absorption, and stalk rot incidence of corn as affected by chloride in potassium fertilizer. Agronomy Journal
TimmC.A., GoosR.J., JohnsonB.E., SobolikF.J., and StackR.W.
1986. Effect of potassium fertilizers on malting barley infected with common root rot. Agronomy Journal
JohnstonA.E., GouldingK.W.T., and MercerE.
1993. Potassium leaching from a sandy loam soil. Potash Review
AskegaardM. and EriksenJ.
2000. Potassium retention and leaching in an organic crop rotation on loamy sand as affected by contrasting potassium budgets. Soil Use and Management
BryeK.R. and NormanJ.M.
2004. Land-use effects on anion-associated cation leaching in response to above-normal precipitation. Acta Hydrochimica et Hydrobiologica
KaramanosR.E., HarapiakJ.T., and FloreN.A.
2003. Application of seed-row potash to barley (Hordeum vulgare L.) grown on soils with high “available” potassium levels. Canadian Journal of Plant Science
BrennanR.F. and JayasenaK.W.
2007. Increasing applications of potassium fertiliser to barley crops grown on deficient sandy soils increased grain yields while decreasing some foliar diseases. Australian Journal of Agricultural Research
GrantC.A., BaileyL.D., and TherrienM.C.
1996. The effect of N, P and KCl fertilizers on grain yield and Cd concentration of malting barley. Fertilizer Research
ZubriskiJ.C., VaseyE.H., and NorumE.B.
1970. Influence of nitrogen and potassium fertilizers and date of seeding on yield and quality of malting barley. Agronomy Journal
TinlineR.D., UkrainetzH., and SpurrD.T.
1993. Effect of fertilizers and of liming acid soil on common root rot in wheat, and of chloride on the disease in wheat and barley. Canadian Journal of Plant Pathology
WalkerW.M. and RainesG.A.
1988. Effect of corn cultivar, phosphorus and potassium on yield and chemical composition. Journal of Plant Nutrition
1998. Corn stalk rot suppression and grain yield response to chloride. Journal of Plant Nutrition
EbelharS.A., KamprathE.J., and MollR.H.
1987. Effects of nitrogen and potassium on growth and cation composition of corn genotypes differing in average ear number. Agronomy Journal
FintelR.G.H. von and QuickeG.V.
1962. Soil fertilization and the protein, zein, essential amino acid and niacin content of maize grain. South African Journal of Agricultural Science
BoswellF.C. and ParksW.L.
1957. The effect of soil potassium levels on yield, lodging, and mineral composition of corn. Soil Science Society of America Proceedings
LiebhardtW.C. and MurdockJ.T.
1965. Effect of potassium on morphology and lodging of corn. Agronomy Journal
HaqM.U. and MallarinoA.P.
2005. Response of soybean grain oil and protein concentrations to foliar and soil fertilization. Agronomy Journal
HelzG.E. and WhitingA.L.
1928. Effects of fertilizer treatment on the formation of nodules on the soybean. Journal of the American Society of Agronomy
SharmaP., DuveillerE., and SharmaR.C.
2006. Effect of mineral nutrients on spot blotch severity in wheat, and associated increases in grain yield. Field Crops Research
NorvellW.A., WuJ., HopkinsD.G., and WelchR.M.
2000. Association of cadmium in durum wheat grain with soil chloride and chelate-extractable soil cadmium. Soil Science Society of America Journal
WahhabA. and AliR.
1962. Effect of nitrogen, phosphorus and potash on lodging, yield, plant characters and the chemical composition of irrigated wheat. Pakistan Journal of Scientific Research
BennettO.L., RouseR.D., AshleyD.A., and DossB.D.
1965. Yield, fiber quality and potassium content of irrigated cotton plants as affected by rates of potassium. Agronomy Journal
BernardiA.C. de C., OliveiraJ.P. deJr, LeandroW.M., MesquitaT.G. da S., FreitasP.L. de, and CarvalhoM. da C.S.
2009. Doses e formas de aplicação da adubação potássica na rotação soja, milheto e algodão em sistema plantio direto. Pesquisa Agropecuária Tropical
CassmanK.G., KerbyT.A., RobertsB.A., BryantD.C., and HigashiS.L.
1990. Potassium nutrition effects on lint yield and fiber quality of Acala cotton. Crop Science
MintonE.B. and EbelharM.W.
1991. Potassium and aldicarb-disulfoton effects on verticillium wilt, yield, and quality of cotton. Crop Science
PettigrewW.T., HeitholtJ.J., and MeredithW.R.Jr
1996. Genotypic interactions with potassium and nitrogen in cotton of varied maturity. Agronomy Journal
PettigrewW.T., MeredithW.R.Jr, and YoungL.D.
2005. Potassium fertilization effects on cotton lint yield, yield components, and reniform nematode populations. Agronomy Journal
PetersJ.B., KellingK.A., SpethP.E., and OfferS.M.
2005. Alfalfa yield and nutrient uptake as affected by pH and applied K. Communications in Soil Science and Plant Analysis
RogersG., PorterR., JolleyL.C., and LeaverD.D.
1977. Management factors and grass tetany in dairy cattle. Australian Veterinary Journal
KetteringsQ.M., GodwinG., CherneyJ.H., and KilcerT.F.
2005. Potassium management for brown midrib sorghum × sudangrass as replacement for corn silage in the north-eastern USA. Journal of Agronomy and Crop Science
MeissnerA.P. and ClarkeA.L.
1977. Response of mown pasture to potassium fertilizer in south-eastern South Australia. Australian Journal of Experimental Agriculture and Animal Husbandry
1977. Effects of N, P, and K fertilization on yield and quality of tall fescue forage in winter. Agronomy Journal
BrennanR.F. and BollandM.D.A.
2006. Soil and tissue tests to predict the potassium requirements of canola in south-western Australia. Australian Journal of Experimental Agriculture
LiY.-M., ChaneyR.L., and SchneiterA.A.
1994. Effect of soil chloride level on cadmium concentration in sunflower kernels. Plant and Soil
1965. The effects of nitrogen, potassium and sodium fertilizers on sugar beet. Journal of Agricultural Science, Cambridge
OttoR., VittiG.C., and de Cerqueira LuzP.H.
2010. Manejo da adubação potássica na cultura da cana-de-açúcar. Revista Brasileira de Ciencia do Solo
GaschoG.J. and KidderG.
1979. Responses to Phosphorus and Potassium and Fertilizer Recommendations for Sugarcane in South Florida. Florida Agricultural Experimental Station Bulletin 809. University of Florida, Gainesville, FL.
MaierN.A., DahlenburgA.P., and FrenshamA.B.
1986. Potassium nutrition of irrigated potatoes in South Australia. 3. Effect on specific gravity, size and internal bruising of tubers. Australian Journal of Experimental Agriculture
SparrowL.A., SalardiniA.A., and JohnstoneJ.
1994. Field studies of cadmium in potatoes (Solanum tuberosum L.). III. Response of cv. Russet Burbank to sources of banded potassium. Australian Journal of Agricultural Research
McLaughlinM.J., MaierN.A., FreemanK., TillerK.G., WilliamsC.M.J., and SmartM.K.
1995. Effect of potassic and phosphatic fertilizer type, fertilizer Cd concentration and zinc rate on cadmium uptake by potatoes. Fertilizer Research
AllisonM.F., FowlerJ.H., and AllenE.J.
2001. Responses of potato (Solanum tuberosum) to potassium fertilizers. Journal of Agricultural Science, Cambridge
1978. Potassium fertilizer trials with potatoes on coarse-textured soils in southeastern Idaho. American Potato Journal
HerlihyM. and CarrollP.J.
1969. Effects of N, P and K and their interactions on yield, tuber blight and quality of potatoes. Journal of the Science of Food and Agriculture
MurphyH.J. and GovenM.J.
1959. Factors Affecting the Specific Gravity of the White Potato in Maine. Maine Agricultural Experiment Station Bulletin 583. University of Maine, Orono, ME.
HahlinM. and JohanssonO.
1973. Fosfor- och kaliumgödsling till matpotatis. Lantbruks-högskolans meddelande. Serie A. NR 192. Royal Agricultural College of Sweden, Uppsala, Sweden.
ConstantinR.J., JonesL.G., and HernandezT.P.
1977. Effects of potassium and phosphorus fertilization on quality of sweet potatoes. Journal of the American Society of Horticultural Science
McLaughlinM.J., PalmerL.T., TillerK.G., BeechT.A., and SmartM.K.
1994. Increased soil salinity causes elevated cadmium concentrations in field-grown potato tubers. Journal of Environmental Quality
JulinB., WolkA., BergkvistL., BottaiM., and ÅkessonA.
2012. Dietary cadmium exposure and risk of postmenopausal breast cancer: A population-based prospective cohort study. Cancer Research
GoffJ.P. and HorstR.L.
1997. Effects of addition of potassium or sodium, but not calcium, to prepartum rations on milk fever in dairy cows. Journal of Dairy Science
HorstR.L., GoffJ.P., ReinhardtT.A., and BuxtonD.R.
1997. Strategies for preventing milk fever in dairy cattle. Journal of Dairy Science
AllcroftR. and BurnsK.N.
1968. Hypomagnesaemia in cattle. New Zealand Veterinary Journal
CherneyJ.H., CherneyD.J.R., and BruulsemaT.W.
1998. Potassium management. In Cherney J.H. and Cherney D.J.R. (eds). Grass for Dairy Cattle. CAB International, Wallingford, England. p. 137–160.
1937. Behavior of Legume Bacteria (Rhizobium) in Relation to Exchangeable Calcium and Hydrogen Ion Concentration of the Colloidal Fraction of the Soil. Missouri Agricultural Experiment Station Research Bulletin 256. University of Missouri, Columbia, MO.
AlbrechtW.A. and DavisF.L.
1929. Physiological importance of calcium in legume inoculation. Botanical Gazette
HeaneyR.P. and Barger-LuxM.J.
1994. Low calcium intake: The culprit in many chronic diseases. Journal of Dairy Science
WuK., WillettW.C., FuchsC.S., ColditzG.A., and GiovannucciE.L.
2002. Calcium intake and risk of colon cancer in women and men. Journal of the National Cancer Institute
NewmarkH.L., HeaneyR.P., and LachanceP.A.
2004. Should calcium and vitamin D be added to the current enrichment program for cereal-grain products?
American Journal of Clinical Nutrition
1997. Calcium and osteoporosis. Nutrition
CentenoV., de BarbozaG.D., MarchionattiA., RodríguezV., and de TalamoniN.T.
2009. Molecular mechanisms triggered by low-calcium diets. Nutrition Research Reviews
KraussA. and SauratA.
1989. Potassium sulphate: K fertilizers for arid and semi-arid zones. In Proceedings of the Workshop on the Role of Potassium in Improving Fertilizer Use Efficiency. National Fertilizer Development Corporation, Islamabad, Pakistan. p. 171–185.
LucasR.E., WheelerE.J., and DavisJ.F.
1954. Effect of potassium carriers and phosphate:potash ratios on the yield and quality of potatoes grown in organic soils. American Potato Journal
DickinsJ.C., HarrapF.E.G., and HolmesM.R.J.
1962. Field experiments comparing the effects of muriate and sulphate of potash on potato yield and quality. Journal of Agricultural Science, Cambridge
RowberryR.G., SherrellC.G., and JohnstonG.R.
1963. Influence of rates of fertilizer and sources of potassium on the yield, specific gravity and cooking quality of Katahdin potatoes. American Potato Journal
LujanL. and SmithO.
1964. Potato quality XXV. Specific gravity and after-cooking darkening of Katahdin potatoes as influenced by fertilizers. American Potato Journal
1977. Virkningen af stigende mængde kaliumklorid og kaliumsulfat på kartoffeludbytte, kogekvalitet og farve af chips. Tiddskrift for Planteavl
RosolemC.A., NakagawaJ., MachadoJ.R., and YamadaT.
1979. Efeitos de modos de aplicação, doses e fontes de potássio na produção da soja. Revista de Agricultura, Piracicaba
Abd El-HadiA.H., KhadrM.S., El-KholyM.H., ZahranF.A., and NegmA.Y.
2002. Comparative effect of potassium sulphate and potassium chloride on crop production and soil chemical properties under Egyptian conditions. Egyptian Journal of Agricultural Research
2004. Agricultural subsidies. A global view. In Dorin B. and Jullien T. (eds). Agricultural Incentives in India. Past Trends and Prospective Paths Towards Sustainable Development. Manohar Publishers, New Delhi, India. p. 39–65.
Environmental Working Group. 2012. Farm Subsidy Database. Available at Web site http://farm.ewg.org/ (verified May 25, 2012).
1950–1963. Commercial Fertilizer Year Book. Walter W. Brown, Atlanta, GA.
Illinois Department of Agriculture. 1964–2010. Illinois Commercial Fertilizer Tonnage Report. Illinois Department of Agriculture, Springfield, IL. Available since 2004 at Web site http://www.agr.state.il.us/programs/fert2/ (verified August 9, 2012).
United States Department of Agriculture. 2012. USDA National Agricultural Statistics Service. Available at Web site http://www.nass.usda.gov (verified May 25, 2012).
TributhH., BoguslawskiE.v., LieresA.v., SteffensD., and MengelK.
1987. Effect of potassium removal by crops on transformation of illitic clay minerals. Soil Science
FrydmanS., RavinaE., and EhrenreichT.
1977. Stabilization of heavy clay with potassium chloride. Geotechnical Engineering
Venkara MuthyaluP., RamuK., and Prasada RajuG.V.R.
2012. Study on performance of chemically stabilized expansive soil. International Journal of Advances in Engineering and Technology
2:139–148. Available at Web site http://www.archives-ijaet.org/media/15I6-IJAET0612724.pdf (verified August 9, 2012).
DeistJ. and TalibudeenO.
1967. Ion exchange in soils from the ion pairs K-Ca, K-Rb, and K-Na. Journal of Soil Science
PalaniappanS., PeckT.R., and BeaversA.H.
1973. Effect of application of high rates of potassium on cation exchange capacity and potassium status of two Illinois soils. Communications in Soil Science and Plant Analysis
CassmanK.G., RobertsB.A., KerbyT.A., BryantD.C., and HigashiS.L.
1989. Soil potassium balance and cumulative cotton response to annual potassium additions on a vermiculitic soil. Soil Science Society of America Journal