Problems of restoration of fallow land in the forest zone of Russia

Influence of the eight-year deposit plowed in the cespitose and podsolic loamy soil grassy (veynik) and wood and shrubby (birch, aspen, willow) biomass on productivity and losses of nutrients - nitrogen, phosphorus, potassium, calcium seyany cereal and bean and cereal by herbages during the first period of development of laylands was studied. It is established that in the first four years after a plowing of biomass decrease in productivity of cultivated forage herbs and consumption of elements of food of plants was noted. The shortage of forage for 4 years in comparison with an arable land (control) was (c/hectare dry basis): 16,1-at embedding of reed grass, 29,4 - of willows, 23,2 - of birches, 33,7 - of aspens on not fertilized background, and against NPK, respectively 24,7, 21,3, 15,2 and 3,6.