The results of a year-long research in the field stationary experiment on investigation of post-effect influence of the use
of fertilisers in grain-weed crop rotation on agro-chemical properties of dark grey podzolic soil and on nutrient and protein
productivity of clover have been presented herein.
It has been found out that the organic system of sugar beets with the saturation of crop rotation of 17,5 tons per hectar of
the organic matter activates the increase in humus content after the fifth rotation by 0,58 percent which is higher than after
the second rotation by 0,15 percent.
In the organic and mineral system of fertilisation regeneration of the humus and the decrease of indices of acidity of the soil
occurs only in case of the greatest saturation possible of crop rotation with organic fertilisers.
The highest productivity of clover is provided for in case of the organic and mineral system of fertilisation of the previous crop
with the saturation of crop rotation of 15 tons per hectar of organic fertilisers and mineral fertilisers (the sum NPK-1030),
which brough about the growth of 34,8 percent of green masss, 37,0 percent of dry substances and 43,3 percent of fodder
dark-grey podzolic soil, the sytem of fertilisation, green mass, fodder units, digestive protein