Abstract
The article presents the materials of agrochemical studies of the soils of the Lankaran Zone. Silt-mursh soils are divided into 2 groups: fully developed silt-mursh soils and poorly developed silt-mursh 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.
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