THE DYNAMICS OF AGROPHYSICAL PROPERTIES OF BLACK SOIL DURING LONG-TERM AGRICULTURAL USE AND THE WAYS OF THEIR OPTIMIZATION IN THE CONDITIONS OF THE KRASNODAR REGION
The article describes experimental material obtained in two long-term experiments of Kubsau on the impact of certain agricultural practices on the basic agrophysical and water indicators of leached black humus, heavy duty. The study was conducted in two agricultural landscapes of lowland rainfed and irrigated lowland-basin. The state of the agrophysical properties of the arable land in two districts of the region was given by Institute "Kuban Niigiprozems". We have established that during prolonged agricultural use, the biggest change of the parameters of the agrophysical properties occurred in the arable layer 0-20 cm. Particularly noticeable compaction was observed on meadow-black soils of lowland-basin agricultural landscapes. The condition of soil structure and the density of the composition influence of level of soil fertility and the system of primary tillage. With the increase in the level of fertility, the coefficient of structure increases. The density of the composition of the studied cultures are much more dependent on tillage to the end of vegetation, especially high is 1,31-1,36 g/cm, it was given by direct sowing. The most destructive effect on soil structure was made by a surface treatment system. Organic fertilizers encourage soil compaction. Manure has a positive impact on the stock of productive moisture in two-meter layer on the background of deep processing