Winter wheat in crop rotations with high percentage of corn and in monoculture
1988
Adamiak, J. (Akademia Rolniczo-Techniczna, Olsztyn (Poland). Katedra Ogolnej Uprawy Roslin)
Response of winter wheat to the shortening of crop rotation and to monoculture was studied in 1977-85 in a strict, statical field experiment, carried out on heavy brown soil. The same percentage of cereals (67 percent) and winter wheat (33 percent) was maintained during sowing in 6-field control crop rotation and in the 3-field experimental ones. Forecrops of winter wheat were differentiated in the 3-field rotations. The levels of mineral fertilization were applied. Shortening of the crop rotation cycle from 6 to 3 years decreased yield of winter wheat by 10 percent on the average. Negative response of winter wheat to 3-field rotations depended on the forecrop. Higher (by 50 percent) doses of mineral fertilization increased the yield of winter wheat but did not alleviate negative phenomena caused by shortening of the crop rotation and by less valuable forecrops
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