INFLUENCE OF MINIMIZING TILLAGE ON AGROPHYSICAL PROPERTIES OF SODDY-MESOPODZOL SOIL

Abstract

There are studied the effect of minimizing tillage by agrophysical parameters of sod-medium podzolic same eroded soil in the Middle Ural conditions in 2017-2018. A comparative assessment of annual underwinter plowing to a deep of 18 cm with annual shallow loosening of the soil up to 8 cm was made on backgrounds with different levels of agrochemical parameters. The influence of the studied factors and their combinations on the density and soil structure in layers 0-10 and 10-20 cm was determined. It is established that annual plowing, providing a looser plow layer (1.32-1.44 g / cm³), inevitably leads to an increase in the content of microaggregates to 18.5%, which means that it reduces the soil structure and its resistance to erosion processes. There is a tendency to decrease the density of the soil for plowing with the deterioration of agrochemical indicators in the low layer of the plow horizon. There are the soil in a layer of 10-20 cm was over-compacted to 1.58-1.59 g/cm³ with a minimal tillage on high and medium backgrounds. The density of the soil in the 0-10 cm layer did not differ significantly from its density during plowing by the high agrochemical background, (1.32-1.33 g / cm³), and the uncultivated layer did not over-compact and had an excellent structural condition (the content of the cloddy-granular structure is 84.1%). There is an agronomically valuable structure of the topsoil was more plowing on the average background. Results of studying have show that the improvement of agrochemical indicators of sod-medium podzolic medium loam soil expands the possibilities of minimizing tillage in the conditions of the Middle Urals.