The effect of biohumus on increasing of the fertility gray-brown soils in Mountainous Shirvan

The introduction of biohumus into degraded gray-brown soils contributed to the improvement of their agrophysical and agrochemical properties. The density of the arable horizon has decreased by 0.02-0.16 g/cm3, the content of water-resistant aggregates, providing an optimal water-air regime, has doubled. The introduction of biohumus can solve the problem of soil overconsolidation. The research results show that when biohumus is introduced into gray-brown soils in an amount of 3.0, 4.0 and 5.0 m/ha, certain changes occur in the humus content according to its introduction, that is, an increase in the humus content in the arable soil layer compared to with the control option was -0.33, 0.51 and 0.62%. Regular use of biohumus will allow to suspend the process of soil dehumification and improve the conditions of the humus state of the soil, as well as the mineral nutrition of plants, leads to an increase in total nitrogen, mobile forms of phosphorus and potassium, which participate and contribute to an increase in soil buffering and prevent the entry of toxic substances into plants.