Bojko M. Productivity of forage crop rotation link depending on the factors of intensification of Western part of Forest-steppe of Ukraine

The soil closeness depends, mainly, on the cultivated cultures and changes during the period of their vegetation. The methods of soil cultivation influence the soil closeness. During flat disk cultivation by the end of vegetation of corn the soil is compressed in a layer of 10-20 cm to 1,46 gr/cm3 and by barley to 1,34 gr /сm3. Long-term herbages in the year of sowing and in the first year of the use improve the soil structure regardless of methods of its cultivation. Mineral fertilizers on the background of manure do not influence the soil closeness.Supplies of productive moisture in the cultivated layer of soil are the same, both in the first year of application of flat disk cultivation and in subsequent years, as well as at ploughing. During flat disc cultivation of barley in the meter layer of soil there is a tendency to the increase and accumulation of moisture. During flat disk soil cultivation of all studied cultures there is the tendency of increasing basic elements of plants' nutrition in soilthat is related to superficial cover of fertilizers and nutrition tailings. In the first year of flat disc cultivation of soil the amount of weeds differentiates a little on the methods of cultivation, in the second and third year the amount of weeds increases in 1,5-2 times as compared to ploughing. During application of fertilizers and herbicides on a silo corn the methods of basic cultivation of soil concerning productivity of plants were equivalent: the harvest of green mass during ploughing made 55,2 t/hа, by flat disc cultivation - 55,6. By barley with sub sowing of clover and clover there is the tendency of productivity increase during flat disc cultivation of soil. The harvest of corn at ploughing makes 3,59 t/hа, at during flat disc cultivation - 3,67. The flat disc cultivation of soil is less energy consuming as compared to ploughing.