• • • Conservation tillage in steppe and forest-steppe of the Central Siberia
Investigations took place in the steppe of Minusinsk Hollow and forest-steppe of the Ob region in Altai. The article reports on antierosion practices and tillage technologies. Investigations analyzed the data of long-term experiments targeting different ecological conditions in forest-steppe and steppe regions. Long-term field trials showed unequal soil-protecting effect of different tillage technologies in various soil-climatic zones of the Central Siberia under green-manured fallow. To increase soil-protecting influence of green-manured fallow in the steppe plowing is necessary that allows preservation of plant residues on soil surface. Such a practice prevented fine soil from being blown-away by wind while plowing under resulted in fine soil removal of 2.5–8.1 t ha-1 per year. In the forest-steppe crop residues left over winter almost completely prevented soil outwash on slope lands in spring. Number of days with dust storms reached 5–13 in Khakassia in 1961–1965 after virgin and long-fallow land cultivation. Nowadays decrease in high-eroded land area and increase of long-fallow lands stopped dust storms. Fallow crop (spring oats) and top manuring of slope soil by rapeseed in autumn prevented soil washout in spring. Grain yield made up 1.64 and 1.76 t ha-1 when plowing under melilot and soil plowing, respectively.
Source: http://kormoproizvodstvo.ru/en/1-2019-2/, p. 27
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