Direct effect and aftereffect of sapropel on agricultural crops yield and agrochemical properties of light grey forest soil

Abstract

The paper states that the research carried out during 2020-2021 revealed the optimal dose of sapropel application for agricultural crops in light grey forest soils, i.e., 30 t/ha. The combined use of sapropel and azofoska took the maximum direct effect and aftereffect in the variant (sapropel at a dose of 15 t/ha and azofoska at a dose of 200 kg/ha). The authors showed a positive role of sapropel not only as a source of plant nutrition elements but also as a stimulator of plant growth and development. The separate application of sapropel not only stimulates the development of cultivated plants but also increases the concentration of nutrients in the soil. However, it is insufficient to obtain high yields. The addition of azophoska to sapropel eliminates the lack of plant nutrients in the soil, as a result of which the maximum yield of agricultural crops is achieved. The use of fertilizers had a positive effect on the main indicators of soil fertility such as the content of organic matter, nitrogen, mobile phosphorus, exchangeable potassium in pH values of exchangeable acidity.