Dynamics of agrochemical properties of gray forest soil of the Western Siberia’s sub-boreal zone affected by a long-term agricultural exploitation

Abstract

We studied the changes in the agrochemical properties of the gray forest soil in the territory of Western Siberia’s sub-boreal zone affected by the long-term use of the organomineral fertilizers in the grain-follow-row crop rotation and in its absence. We used virgin areas of gray forest soil situated in the immediate proximity to the fields as a control. The anthropogenic changes of morphological features throughout the gray forest soil profile were identified based on the use of fixed permanent plots laid down in 1960. This paper describes the dynamics of the actual, exchange, and hydrolytic acidity as well as the amount of absorbed bases, together with the base exchange capacity and the degree of base saturation. The study of arable gray forest soil for the period 1960-2020 was performed. This provided an opportunity to identify the causes of its chemical degradation in the sub-boreal zone of the Trans-Urals under the conditions of a plant residue shortage. The systematic use of mineral fertilizers affects the base exchange capacity and triggers an increase in the arable layer’s acidity. The use of an organic fertilizer system stabilizes the chemical properties of gray forest soil.

Genetic resistance of oat of West Siberian breeding to contrasting weather conditions and mineral nutrition level

“…Therefore, grain crops on a natural agricultural background, without the introduction of mineral fertilizers, develop in conditions of nitrogen nutrition deficiency. Protein formation on such soils is mainly due to the genetic characteristics of the variety [15].…”

Phosphorus-potassium state as an element of natural fertility of gray forest soils of Western Siberia

“…During the period from 1965 to 2020, 12 million hectares of the south of the Tyumen region were explored, which has the maximum potential for expanding agriculture in Western Siberia. The area of the studied gray forest soils in the region is almost 900 thousand hectares (6.3% of the territory of the south of the Tyumen region) [9,10]. 96 full-profile sections were laid on light gray forest soils, 111on gray forest soils and 123 -on dark gray forest soils.…”

The nature of organic carbon and total nitrogen distribution in the fractions of leached chernozem aggregates and gray soil in Western Siberia

“…Short summers and harsh winters require farmers to make quick decisions on growing crops and developing a farming system for them. The achievements of modern breeding, agrochemistry, and agriculture have ensured the advancement of agriculture to the north, where 100 years ago no one thought of cultivating grain crops, developing animal husbandry and poultry farming [6,7,8,9]. In digitalization era, it became possible to develop optimization models on a mathematical basis, which made it possible to increase the productivity of arable land with expanded fertility reproduction [10].…”