Agrochemical features of soils under vegetable crops in the Lankaran zone (Azerbaijan)

The article presents the materials of agrochemical studies of the soils of the Lankaran Zone. Silt-marsh soils are divided into 2 groups: fully developed silt-marsh soils and poorly developed silt-marsh soils. The studied soils are sufficiently provided with humus and nitrogen; there are few nitrogen-containing compounds that can be absorbed by plants. Unlike nitrogen, the source of phosphorus nutrition for plants is only phosphates in the soil and fertilizers applied to the soil. Due to the large amount of humus in waterlogged soils, organic phosphorus compounds are also high. As a result of studies conducted by various scientists on swampy soils, it was found that 40% of total phosphorus is in organic and 58% in mineral forms.