Nitrogen Fixation by Legumes in Mediterranean Agriculture: by P. S. Cocks (auth.), D. P. Beck, L. A. Materon (eds.) PDF

By P. S. Cocks (auth.), D. P. Beck, L. A. Materon (eds.)

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Read Online or Download Nitrogen Fixation by Legumes in Mediterranean Agriculture: Proceedings of a workshop on Biological Nitrogen Fixation on Mediterranean-type Agriculture, ICARDA, Syria, April 14–17, 1986 PDF

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Additional info for Nitrogen Fixation by Legumes in Mediterranean Agriculture: Proceedings of a workshop on Biological Nitrogen Fixation on Mediterranean-type Agriculture, ICARDA, Syria, April 14–17, 1986

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It is necessary to obtain sufficient soil and plant samples, select potential field sites, and to become familiar with the history of the host plant in the area. Strain Collection Specific sampling sites should be chosen within each major subregion and characterized on the basis of agronomic history, current use, soil type, drainage, and chemical composition of the soil. Sampling ought to include those sites at which the host species 1) grows at present, 2) has grown in the past, and 3) has never grown (not applicable for clovers and medics in most Mediterranean countries where many of these species occur naturally).

1. Number of flowers at each clipping of Medicago truncatula grown under different water stress treatments. truncatula directed all its potential towards pod formation and filling. The number of nodules was reduced by water stress treatments from 42 nodules/plant in the control to 12 nodules/plant in T4 indicating a decrease in nitrogen fixation by the plant. After rewatering, the number of nodules increased showing a recovery of the nitrogen fixing system through the formation of new nodules. Water stress reduced nitrogen fixation and plant production, but reduced seed production only when the stress was very severe, to the point that most of the plants were killed.

Chemical and Microbiological Properties. 9. American Society of Agronomy, Madison, Wisconsin, USA. W. J. 1983. The annual legume pasture in cereal-ley farming systems in southern Australia: a review. Agriculture, Ecosystems and Environment 9: 229-267. M. F. 1976. Nodulation of Trifolium subterraneum by introduced rhizobia in competition with naturalized strains. Soil Biology and Biochemistry 8: 403-407. J. J. 1982. Production and control of legume inoculants. ). Academic Press, Sydney, Australia.

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