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This article reports the results obtained during a study of the economic efficiency of organic grain farming and risk factors that reduce efficiency. It was determined that all the surveyed farms which did not use modern plant nutrients or pesticides in the production of rye, barley and wheat suffered great economic losses. These losses result from a disparity between high production costs and low income from the actual or potential sale of grain. The cause of losses is the low grain yield: however, the main economic risk is caused by low photosynthesis capability exhausted by plant diseases and insufficient plant nutrition, a condition that prevents the accumulation of solar energy in order to ensure an economically efficient yield.
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