Effects of soil tillage and crop sequence on weediness of oilseed winter rape (Brassica napus L.) sowings | Augsnes apstrādes un augu maiņas ietekme uz ziemas rapša (Brassica napus L.) sējumu nezāļainību
2015
Ausmane, M., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Melngalvis, I., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
Soil tillage is one of the most power consuming and expensive processes in agricultural production. Minimum tillage practices have a significant ecological as well as agronomic impact by reducing the soil disturbance and enhancing the soil system stability. The paper presents the results of stationary field experiments carried out at the Study and Research Farm “Peterlauki” of the Latvia University of Agriculture during the period 2010–2014. Two soil primary tillage treatments were investigated: conventional ploughing or plough tillage (0.22–0.23 m) with a mouldboard plough was compared with the minimum or shallow (0.10–0.12 m) tillage with a disc harrow. The weed control with herbicides was applied. The hypothesis states that the decreasing intensity of soil tillage has an important influence on the weed population because an amount of weeds may increase. The significantly higher amount of annual and perennial weeds was determined in the winter rape before harvesting on soils with ploughless tillage. Statistically significant differences in weed weight were not observed in the investigations when ploughing was replaced by minimum tillage.
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