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The purpose. To study effect of moderate doses of artificial fertilizers, green manure crops and nonmerchantable produce of plant growing on productivity of 4field grain-beet crop rotation at different systems of soil cultivation and to determine removal of nutrients crops from soil. Methods. Field, laboratory, statistical. Results. Effect of organic and mineral fertilizer systems upon productivity of cultures of short crop rotation is studied at moldboard and minimum systems of cultivation as well as indexes of removal of nutrient elements of soil. It is determined that the highest productivity of crop rotation was at organic fertilizer system on the background of moldboard system of cultivation. Conclusions. Moldboard system of soil cultivation in comparison with minimum one has ensured higher productivity of crop rotation in all alternatives of fertilizing. In particular, in alternative without fertilizing -for 37 c/hectare of f.u., in organic and mineral systems accordingly -for 43 and 30 c/hectare of f.u. Moldboard cultivation of soils resulted in higher percentage of the content and removal of nutritive matters with the yield of cultures of crop rotation.Key words: moldboard and minimum systems of soil cultivation, productivity of crop rotation, organic and mineral fertilizer systems.Application of mineral and organic fertilizers is one of the main conditions and a powerful way of improving the productivity of crops. At the same time, when the application of traditional organic fertilizers was reduced so that it cannot meet the needs of agriculture in fertilizing fields, the use of alternative sources of organic matter becomes increasingly relevant. On the other hand, given the rapid rise in prices for mineral fertilizers, not all agribusinesses are able to use high

За результатами досліджень встановлено, що ви-щі показники продуктивності рослин формуються засівби в період із 10 по 20 вересня. Для більшості сор-тів сівба 20 вересня сприяла найбільшому прояву їхгенетичного потенціалу за показниками продуктив-ності. Встановлена закономірність зниження проду-ктивності в разі відхилення строків сівби від опти-мальних як у бік ранніх (10 вересня), так і пізніх (1 та10 жовтня). Сівба у пізні строки зумовлює різкезниження продуктивності пшениці озимої. Отже,оптимальними строками сівби для умов північноїчастини лівобережного Лісостепу України слід вва-жати 10–20 вересня. Thus, the optimal conditions for the northern part of the Left Bank steppe of Ukraine sowing dates should be considered 10-th – 20-th of September. For most varieties sowing on September the 20-th contributed to greater performance of their genetic potential in terms of productivity. The stated regularity of productivity loss have been stated at a deviation from the optimum sowing time to earlier (September the 10-th) and later (1-st and 10-th of October). Sowing in the later periods in most years leads to greater yield reduction than at early sowing.

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