Effect of soil loosening during sowing on the yield of barley
1995
Kuht, J. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Soil Management and Crop Product Technology)
According to prof. E. Haller, a yield depends in the first place on the environmental conditions during the germination period of seeds. Germination of seeds and development of a root system depend above all on the soil conditions - bulk density, solidity and porosity. A high yield is greatly dependent on the root system. In thickened and rapidly thickening soils a normal root development is disturbed by mechanical resistance of a soil and its poor aeration. In thick soils the roots can normally develope only in cavities left by the roots of preliminary crops. The bulk density of 1.2 cm (-3)...1.4 g cm (-3) is considered to be the optimum for the growth of grain crops. In thicker soils the normal development of roots is hindered and it results in a lower yield. The results of the field experiments showed that with minimization less intensive tillage produces environment more favourable for germination of seeds than in the case of traditional technology. Combined soil tillage and use of sowing aggregate enable us to create the best physical conditions for seed germination. The positive effect of local fertilizing on the yield is widely known. But its co-effect the loosening of the soil between the rows - on the grain crop has not been studied yet
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