The influence of sunflower culture on water and nutrition rates of soil in the systems of short-term crop rotations

The article presents the research results on the influence of short-term rotation of sunflower saturation under the conditions of insecure moistening of Forest-steppe area. The role of sunflower in the formation of soil irrigation regime in the crop rotation system is shown. The study of soil toxicity indicated that the conventional unit (cumarin) content was almost doubled when sunflower was cultivated in two-course rotation in comparison with five-course rotation.