Abstract
Upon the conducted research, the adverse effect of working parts in DT-75, MTZ-80 and T-150 K tractor series commissioned in the Republic of Armenia and Artsakh on the soil density and crops yield capacity has been justified. Based on the scientific experiments a method for the determination of maximum permissible specific pressure and optimal number of passes for the tilling machine has been developed. The introduction of minimum tillage system would enable to prevent the over-compaction of the topsoil, reduce the amount of soil clods in the tuber-soil mass during the harvest time, improve the sifting process of tuber crops and increase efficiency of harvest.
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