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В 1973 - 1984 гг. был проведен опыт с целью определения возможности упрощения севооборотов на лёгкой почве. На основании полученных результатов установлено, что при применении упрощенной зернопропашной модели севооборота (картофель - рожь - рожь - рожь) можно получить в среднем близкие традиционному севообороту (картофель рожь - смесь зернобобовых растений - рожь) производительности зерно вых единиц/га...
The respective investigations were carried out in 1981 - 1985 on the basis of long-term field experiments. The cereal monoculture: oats - rye - rye - rye, and the crop rotation: potatoes - rye - mixture of leguminous crops - rye, were compared. Microbiological investigations proved that monoculture caused a reduction of the number of proteolytic microorganisms and Azotobacter in the soil and an increase...
An increase of the share of cereal crops in the crop rotation from 50 up to 75% resulted in a reduction of the content of carbon and nitrogen (both total and mineral). Similar results were obtained also at the share of 25% of cereals in the crop rotation. Cultivation of grasses and of winter aftercrop resulted in an increase of the carbon and total nitrogen content in soil. At fertilization with slurry,...
In the 10-year field experiment (1972-1982) carried out at the Agricultural Experiment Station Lipki, the following factors were compared: I - two ploughing depths for potatoes, 25 and 35 cm, II - four soil tillage ways of different depth for successive cereal crops, III - two mineral fertilization levels: 1 NPK 260 kg/ha for potatoes and 200 kg/ha for cereals as well as 1.5 NPK - 390 kg/ha for potatoes...
The 10-year investigations carried out on soil of a weak ryeland complex have proved that an increase of the share of rye from 50 up to 75% leads to a drop of average yields of this species by 12-14%. An increase of the share of cereals up to 100% by including oats into the crop rotation inhibited further drop of the yields. Yield fluctuations in the investigation years (determined by the variability...
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