Nocuity of illnesses of separate grades of grain crops and flax depending on conditions of growth

Various agromicrolandscapes provide different conditions for the productivity of agricultural plants. Due to the unequal resistance of plants to illnesses, mentioned conditions can variously decrease their productivity. The productivity formation of spring wheat, barley and long-stalked flax in relation to the invasion in various agromicrolandscapes of meliorated terminal moraine hill is shown. A mathematic relation between these factors is revealed. Increasing of illnesses by 1% decreases the productivity by 0,168 - 1,0 centner/hectar.