| Popis: |
With regard to the new farming system on an agrolandscape basis, new means of mechanization have been proposed for harrowing the soil and crops, as well as sowing of cereal crops with simultaneous introduction of the main, starting fertilizer and rolling of the crops with a spiral-helix roller. The combination of these operations in a single pass of the multifunctional sowing unit proposed by the authors is based on working bodies such as dressing knives for the main application of mineral fertilizers, conventional double-disc coulters for sowing cereal crops and starting dose of fertilizers, as well as a spiral-helix roller pivotally fixed to the frame of the grain seeder , for rolling sown seeds to a predetermined depth in the soil layer with optimum density. The dependences of the specific traction resistance of the modernized spring harrow and the spiral-helix roller as a function of the operating speed under various operating modes are presented. A strategy has been proposed to mechanize the processes of pre-sowing preparation of the soil for sowing corn and caring for crops, in contrast to the well-known basic technology, and modernized working bodies of the machine unit based on a spring harrow have been developed. In the proposed strategy, taking into account the farming system, the technological complexes of machines for the cultivation of corn according to the basic and proposed technologies are justified. Keywords: mechanization, agriculture, harrowing, seeding, multifunctional unit, combination of operations, efficiency. |
