Wheat response after temperate crop legumes in south-eastern Australia [yield, nitrogen content; rotations]
1991
Evans, J. | O'Connor, G.E. (New South Wales Agriculture and Fisheries, Wagga (Australia). Agricultural Research Inst.) | Fettell, N.A. (New South Wales Agriculture and Fisheries, Condobolin (Australia). Agricultural Research and Advisory Station) | Coventry, D.R. (Victorian Dept. of Agriculture and Rural Affairs, Rutherglen (Australia). Research Inst.) | Walsgott, D.N. (Victorian Dept. of Agriculture and Rural Affairs, Walpeup (Australia). Mallee Research Station) | Mahoney, J. (Victorian Dept. of Agriculture and Rural Affairs, Horsham (Australia). Crops Research Inst.) | Armstrong, E.L. (New South Wales Agriculture and Fisheries, Cowra (Australia). Agricultural Research Station)
At 15 sites in New South Wales and Victoria, wheat yielded 44 percent more when following a lupin crop, and 32 percent more after a pea crop, than following wheat or barley. Biomass and N content of tops and grain were increased. As sources of the extra N, mineral N conserved in the soil by legume growth and N added in legume residues were both considered significant. Responses generally, and relative responses to the species of legume varied considerably between sites. Nonlegume break crops (e.g. linseed) also increased yield over repeated cereals, but not to the same extent.
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