The influence of agricultural background on the effect of minimization of pre-sowing soil cultivation
1994
Kuht, J. (Estonian Agricultural Univ., Tartu (Estonia))
During long time experiments an effect of combined aggregates (soil treatment+sowing+rolling) on the physical properties of the soil and yield of barley in the case of different preliminary crops and quantity of humus was studied. It was compared with a traditional technology consisting of separate tillage operations. The minimization of pre-sowing soil cultivation enables the soil to store better its moisture supplies. It was especially expressed in case of prolonged drought, when the soil moisture content in the layer of 0...4 cm and 5...9 cm was higher by 1.1 per cent and 1.3 per cent respectively, compared with the application of the traditional technology. The best fractional composition of the soil was obtained in the case of minimization. In comparison with traditional soil tillage and sowing the content of agronomically valuable soil aggregates was higher by 5.0...9.6 per cent, at lower quantity of humus even 17 per cent. In the case of preliminary crops such as cereals and at lower humus contents minimizing always caused increase in the yield up to 8.9...33.5 per cent. However, application of this technology had no effect on the yield against the background of potato
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