Agrophysical properties of soil depending on crops of grass field crop root summary

Relevance. The agrophysical state of the soil is essential for the successful development of agricultural production. The purpose of the study is to study the influence of grass-field crop rotation on the agrophysical, biological properties of soil fertility and crop productivity in the forest-steppe zone of North Ossetia — Alania.

Methodology. The studies were carried out in 2020–2022 in the field stationary crop rotation of the in the conditions of the forest-steppe zone of the North Ossetia — Alania . The soil of the experimental plot is represented by leached chernozems on pebbles. Bookmarking experiments, phenological observations, statistical processing of the data obtained was carried out according to generally accepted methods.

Results. It was found that at the beginning of the growing season, the lumpy fraction under crop rotation varied from 13.34 to 49.45%, in the macrostructure — from 48.42 to 81.77%, for an aggregate 0.25 mm thick — from 1.77 up to 7.99%. By the end of the growing season, the proportion of dusty fraction under winter wheat decreased from 8.01 to 1.09%. The structural coefficient varied from 2.22% (corn) to 2.49% (oats + clover). Studies have shown that the studied soil has a good structure, since it contains from 46.0 to 66.2% of water-stable aggregates. On crops of oats + clover (average (0–30 cm) soil layer), the soil density was 0.95 g/cm3 at the beginning of the growing season, 1.19 g/cm3 — during the period of intensive growth, 1.22 g/cm3 — in the end of the growing season. This trend is manifested in all crop rotation crops. It should be noted that grass links are more productive, where the collection of fodder units (16.37 t/ha) exceeds the indicators of the tilled link by 1.98 t/ha. In general, the exchange energy of the grass-field link of the crop rotation turned out to be 2.17 GJ/ha more than the tilled one and amounted to 13.43 GJ/ha.

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