Species composition and density of weeds in a grain maize crop depending of soil tillage

P. Yankov*, M. Drumeva Department of Plant Production, Faculty of Manufacturing Engineering and Technologies, Technical University of Varna, 1 Studentska Str., 9010 Varna, Bulgaria (Manuscript received 5 September 2020; accepted for publication 26 October 2020) Abstract. The study was
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Theoretical determination of the width of strip for turning when ploughing with a traditional plough in a field with irregular shape

Ploughing with a traditional plough requires bed-like movement of the unit. The field is divided into beds (strips) and each of them is processed individually. Two ways of movements alternate. They are called “ridge” (moving in a clockwise direction) and “furrow̶
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