Abstract
The article analyzes the amount of the main elements of mineral nutrition carried by weeds, formed in the agrophytocenosis of soybeans, depending on the farming systems. The use of surface and moldboard-free tillage of the soil, weeds take out more nutrients than with differentiated cultivation. Removal of the main nutrients from the soil by weeds also depends on farming systems. According to the ecological and biological system of farming, the removal of nutrients was 1,2-2,8 times higher compared to the intensive farming system. The revealed greatest losses of nutrients from harmful components of the agrocenos, are observed when using a biological (organic) farming system. The use of moldboard-free tillage leads to a significant decrease in the yield of soybeans in comparison with the differentiated and dump-moldboard tillage.
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