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Barley yield and crop weediness as a function of the type of crop rotation fertilization rates and application of herbicides



Barley yield and crop weediness as a function of the type of crop rotation fertilization rates and application of herbicides



Izvestiya Timiryazevskoi Sel'skokhozyaistvennoi Akademii (5): 26-30



The work was performed in 1981-1985 on the training farm "Milkhailovskoye". It is found that weediness in barley stands is 2 times lower (and the amount of perennial weeds.sbd.8-9 times lower) under crop rotation system than when the crop is grown as monoculture, the yield of barley being higher by 38-65%. With regular application of nitrogenous fertilizers in NPK, the rate of nonperennial weeds is reduced 2-2.5 times, while that of perennial weeds.sbd.6.5-20 times and more, but their biomass becomes higher. In the investigated fertilization variants on soddy-slightly-podzolic medium loams, the highest yield of barley was obtained with application only phosphoric (300P), only potassium (24OK), or complete fertilizer (100N150P120K) in combination with liming. The role of played by the investigated factors of farming intensification in increasing barley yield is rapidly diminishing in the succession: crop rotation - mineral nutrition rate - herbicides.

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