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Yields of crop dry matter and nitrogen in long-term barley rotation trials at two sites in northern Syria

Published online by Cambridge University Press:  27 March 2009

M. J. Jones  and
M. Singh
M. J. Jones
Affiliation:
International Center for Agricultural Research in the Dry Areas, PO Box 5466, Aleppo, Syria
M. Singh
Affiliation:
International Center for Agricultural Research in the Dry Areas, PO Box 5466, Aleppo, Syria
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Summary

Trials were established at two sites in 1982 to compare six 2-course rotations, in which barley alternated with feed legumes (pure or mixed with barley), fallow or barley, in partial factorial combination with different N and P fertilizer regimes. This paper summarizes data from the second to the seventh cropping seasons.

Barley yielded most after fallow and more after legumes than after barley; but, on the basis of total dry matter production over both courses, barley-legume rotations outyielded barley-fallow and barley-barley rotations. In terms of net nitrogen offtake, which may be taken as a rough measure of feed value, barley-legumes surpassed the other rotations by c. 100% at both sites, whether the comparison was made on values obtained from plots with or without added fertilizer. Of the legumes, Lathyrus sativus was slightly more productive than Vicia saliva, and this carried over into the rotational yield of both dry matter and nitrogen. Rotations involving pure legumes were slightly more productive than those involving legume/barley mixtures.

Yields of all crops and rotations varied greatly from year to year depending on rainfall. Those of the barley-fallow rotation were much less variable than those of the barley-barley rotation at the wetter site (323±103 mm), with the barley-legume rotation intermediate; but variability was much greater at the drier site (250±79 mm), with much less difference between rotations. Nevertheless, fertilizer use and rotations including legumes gave a significant yield advantage under the driest conditions.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 124 , Issue 3 , June 1995 , pp. 389 - 402
Copyright
Copyright © Cambridge University Press 1995

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References

Abd El Moneim, A. M., Cocks, P. S. & Swedan, Y. (1988). Yield stability of selected forage vetches (Vicia spp.) under rainfed conditions in west Asia. Journal of Agricultural Science, Cambridge 111, 295–301.Google Scholar
Cady, F. B. & Mason, D. D. (1964). Comparison of fertility treatments in a crop rotation experiment. Agronomy Journal 56, 476–479.Google Scholar
Genstat 5 Committee (1987). Genstat 5 Reference Manual. Oxford: Clarendon Press.Google Scholar
Gibbon, D. (1981). Rainfed farming systems in the Mediterranean region. In Soil, Water and Nitrogen in Mediterranean-type Environments (Eds Monteith, J. & Webb, C.), pp. 59–80. The Hague: Martinus Nijhoff/Dr W. Junk.CrossRefGoogle Scholar
Harmsen, K. (1984). Dryland barley production in northwest Syria. 1. Soil conditions. In Proceedings of Soils Directorate/ICARDA Workshop on Fertilizer Use in the Dry Areas, pp. 12–41. Aleppo. Syria: ICARDA.Google Scholar
Harris, H. (1989). Crop water use and water use efficiency in contrasting barley rotations. In Farm Resource Management Program, Annual Report for 1988, pp. 36–54. Aleppo, Syria: ICARDA.Google Scholar
Jaubert, R. & Oglah, M. (1985). Sheep feeding strategies in the Bueda/Breda subarea, 1983/84. ICARDA Research Report. Aleppo, Syria: ICARDA.Google Scholar
Jones, M. J. (1989). Barley rotation trials at Tel Hadya and Breda stations. ICARDA Research Report, No. 140. Aleppo, Syria: ICARDA.Google Scholar
Jones, M. J. (1993). Barley-based farming systems of the Mediterranean. In The Agrometeorology of Rainfed Barley-based Farming Systems (Eds Jones, M. J., Mathys, G. & Rijks, D.). Aleppo, Syria: ICARDA.Google Scholar
Papastylianou, I. (1990). The role of legumes in the farming systems of Cyprus. In The Role of Legumes in the Farming Systems of the Mediterranean Areas (Eds Osman, A. E., Ibrahim, M. H. & Jones, M. A.), pp. 39–49. Dordrecht, Netherlands: Kluwer Academic Publishers.Google Scholar
Pasture, Forage and Livestock Program (1986). Annual Report of Pasture, Forage and Livestock Program. Aleppo, Syria: ICARDA.Google Scholar
Thomson, E. F. (1987). SFeeding systems and sheep husbandry in the barley belt of Syria. ICARDA Research Report, No. 106. Aleppo, Syria: ICARDA.Google Scholar
Thomson, E. F., Bahhady, F. A. & Martin, A. (1989). Sheep husbandry at the cultivated margins of the northwestern Syrian steppe. ICARDA Research Report, No. 148. Aleppo, Syria: ICARDA.Google Scholar
Yates, F. (1954). The analysis of experiments containing different crop rotations. Biometrics 10, 324–346.Google Scholar