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Killing cover crops mechanically: Review of recent literature and assessment of new research results

  • Nancy G. Creamer (a1) and Seth M. Dabney (a2)
Abstract
Abstract

Cover-crop residues left on the soil surface as a mulch in no-till crop production systems protect the soil from erosion, increase water infiltration and suppress weeds. Because many growers using cover crops want to reduce chemical inputs, non-chemical methods of killing or suppressing cover crops are needed. In the first part of this paper we review the current literature and discuss advantages and disadvantages of five mechanical methods for killing cover crops, i.e., mowing, rolling, roll-chopping, undercutting and partial rototilling. We also report on three new studies that broaden the current literature, including planting into freshly killed residue. In the first study, the use of planter attachments to remove surface residues from the planter row improved stands when cotton was no-till planted 2–7 days after mowing cover crops in Mississippi. In the second study, 100% of a rye/vetch cover crop in Missouri was killed by mowing, and greater than 90% was killed by roll-chopping. Cotton stands were reduced by the use of row cleaners that clogged when the cover crop was roll-chopped or mowed on the same day that the crop was planted. The third study evaluated three methods of mechanically killing summer cover crops in North Carolina. Undercutting provided greater than 95% kill for five of six broadleaf species, and two of five grass species. Mowing effectively killed all six broadleaf cover crops, but re-growth occurred with three of five grasses, with the exception of nearly mature German foxtail millet and mature Japanese millet. In general, rolling did not effectively kill broadleaf or grass cover crops, with the exception of nearly mature German foxtail millet, mature Japanese millet and mature buckwheat.

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Corresponding author
N.G. Creamer (nancy_creamer@ncsu.edu).
References
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1.Bauer P.J., and Reeves D.W.. 1999. A comparison of winter cereal species and planting dates as residue cover for cotton grown with conservation tillage. Crop Sci. 39:18241830.
2.Blevins R.L., and Frye W.W.. 1993. Conservation tillage: An ecological approach to soil management. In Sparks D.L. (ed.). Advances in Agronomy 51. Academic Press, San Diego, CA. p. 3473.
3.Creamer N.G., and Baldwin K.R.. 2000. An evaluation of summer cover crops for use in vegetable production systems in North Carolina. HortScience 35:600603.
4.Creamer N.G., Plassman B., Bennett M.A., Wood R.K., Stinner B.R., and Cardina J.. 1995. A method for mechanically killing cover crops to optimize weed suppression. Amer. J. Alternative Agric. 10:157162.
5.Creamer N.G., Bennett M.A., Stinner B.R., and Cardina J.. 1996. A comparison of four processing tomato production systems differing in cover crop and chemical inputs. J. Amer. Soc. Hort. Sci. 121:559568.
6.Dabney S.M., and Griffin J.L.. 1987. Efficacy of burn down herbicides on winter legume cover crops. In Power J.F. (ed.). The Role of Legumes in Conservation Tillage Systems. Soil Conservation Society of America, Ankeny, IA. p. 122125.
7.Dabney S.M., Buehring M.W., and Reginelli D.B.. 1991. Mechanical control of legume cover crops. In Hargrove W.L. (ed.). Cover Crops for Clean Water. Soil and Water Conservation Society, Ankeny, IA. p. 146147.
8.Dabney S.M., Schreiber J.D., Rothrock C.S., and Johnson J.R.. 1996. Cover crops affect sorghum seedling growth. Agron. J. 88:961970.
9.Derpsch R., Sidiras N., and Roth C.H.. 1986. Results of studies made from 1977 to 1984 to control erosion by cover crops and no-tillage techniques in Paraná, Brazil. Soil Tillage Res. 8:253263.
10.Derpsch R., Roth C.H., Sidiras N., and Köpke U.. 1988. Erosionsbekämpfung in Paraná, Brasilien: Mulchsysteme. Direktsaat, und konservierende Bodenbearbeitung. Schriftenreihe der GTZ Nr. 205. Deutsche Gesellschaft für Technische Zusammenarbiet (GTZ).
11.Grubinger V.P., and Minotti P.L.. 1990. Managing white clover living mulch for sweet corn production with partial rototilling. Amer. J. Alternative Agric. 5:412.
12.Hoffman M.L., Regnier E.E., and Cardina J.. 1993. Weed and corn (Zea mays) responses to a hairy vetch (Vicia villosa) cover crop. Weed Technol. 7:594599.
13.Janovicek K.J., Vyn T.J., and Voroney R.P.. 1997. No-till corn response to crop rotation and in-row residue placement. Agron. J. 89:588596.
14.Kaspar T.C., and Erbach D.C.. 1998. Improving stand establishment in no-till with residue-clearing planter attachments. Trans. American Society of Agricultural Engineers (ASAE) 41:301306.
15.Langdale G.W., Blevins R.L., Karlen D.L., McCool D.K., Nearing M.A., Skidmore E.L., Thomas A.W., Tyler D.D., and Williams J.R.. 1991. Cover crop effects on soil erosion by wind and water. In Hargrove W.L. (ed.). Cover Crops for Clean Water. Soil and Water Conservation Society, Ankeny, IA. p. 1523.
16.Laub C.A., and Luna J.M.. 1991. Influence of winter cover crop suppression practices on seasonal abundance of armyworm (Lepidoptera: Noctuidae), cover crop regrowth, and yield in no-till corn. Environ. Entomol. 20:749754.
17.Laub C.A., and Luna J.M.. 1992. Winter cover crop suppression practices and natural enemies of armyworm (Lepidoptera: Noctuidae) in no-till corn. Environ. Entomol. 21:4149.
18.Morse R.D. 1993. Components of sustainable production systems for vegetables—conserving soil moisture. HortTechnology 3:211214.
19.Morse R.D. 1995. No-till, no-herbicide systems for production of transplanted broccoli. In Kingery W.L. and Buehring N. (eds.). Conservation-Farming—A Focus on Water Quality. Proc. 1995 Southern Region Conservation Tillage for Sustainable Agriculture, Jackson, Mississippi, 26–28 06 1995. p. 113116.
20.Raimbault B.A., Vyn T.J., and Tollenaar M.. 1990. Corn response to rye cover crop management and spring tillage systems. Agron. J. 82:10881093.
21.Reeves D.W., Wood C.W., and Touchton J.T.. 1993. Timing nitrogen applications for corn in a winter legume conservation-tillage system. Agron. J. 85:98106.
22.Ristaino J.B., Parra G., and Campbell C.L.. 1996. Suppression of Phytophthora blight in bell pepper by a no-till wheat cover crop. Phytopathology 87:242249.
23.Sarrantonio M., and Scott T.W.. 1988. Tillage effects on availability of nitrogen to corn following a winter green manure crop. Soil Sci. Soc. Am. J. 52:16611668.
24.SAS Institute. 1989. SAS/STAT User's Guide Version 6. 4th edn.Cary, NC.
25.SAS Institute. 1996. SAS/STAT Software: Changes and Enhancements through Release 6.11. Cary, NC.
26.Teasdale J.R. 1993. Reduced-herbicide weed management systems for no-tillage com (Zea mays) in a hairy vetch (Vicia villosa) cover crop. Weed Technol. 7:879883.
27.Teasdale J.R., and Shirley D.W.. 1998. Influence of herbicide application timing on corn production in a hairy vetch cover crop. J. Prod. Agric. 11:121125.
28.Triplett G.B., Dabney S.M., and Siefker J.H.. 1996. Tillage systems for cotton on silty upland soils. Agron. J. 88:507512.
29.Wilkins E.D., and Bellinder R.R.. 1996. Mow-kill regulation of winter cereals for spring no-till crop production. Weed Technol. 10:247252.
30.Zehnder G.W., and Hough-Goldstein J.. 1990. Colorado potato beetle (Coleoptera: Chrysomelidae) population development and effects on yield of potatoes with and without straw mulch. J. Econ. Entomol. 83:19821987.
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American Journal of Alternative Agriculture
  • ISSN: 0889-1893
  • EISSN: 1478-5498
  • URL: /core/journals/american-journal-of-alternative-agriculture
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