Parameters determining yield of field crops in relation to the amount of nitrogen absorbed
1994
Osaki, M. (Hokkaido Univ., Sapporo (Japan). Faculty of Agriculture) | Matsumoto, M. | Shinano, T. | Tadano, T.
Several field crops were grown at different nitrogen levels during 6 y, and under combinations of nitrogen levels and plant density. Then the parameters which determine the economic yield (Ye) were evaluated by using the following formula. Ye = Yb x HI(DM), Ye = Yb(N) x HI(n) / Nc(h.o,) x 100, and Ye = Gn x Gw, where Yb is the biological yield; HI(DM) is the harvest index of dry matter; HI(N) is the harvest index of nitrogen; YB(N) is the amount of nitrogen accumulated in plants; Nc(h.o.) is the nitrogen content of harvesting organs; Gn is the number of grains or tubers; and Gw is the one-grain weight or one-tuber weight
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