Increasing the fertility of gray-brown soils under the dry-land farming conditions in Mountain Shirvan

It was revealed that gray-brown (chestnut) soils subject to degradation have low potential fertility, poor supply of nitrogen and phosphorus, and therefore require the introduction of biohumus and mineral fertilizers. With the introduction of biohumus and fertilizers, the greatest accumulation of basic nutrients is observed, the agrochemical and other properties of the soil are improved, and the prerequisites are created for obtaining high yields of barley in dry-land conditions.