Effect of fragmentation and pacing at spot ploughing on dry soils

Abstract

Seedbed preparation to achieve desired aggregate size requires many tillage operations when performed on dry soil. A very common implement used for the initial operation is the moldboard plough, subsequent passes may include disk, chisel ploughs, cultivators, rototillers and harrows. Therefore ploughing should form flat soil surface to ensure favorable conditions for performance of subsequent operations. Mechanical reconsolidation by fragmenting and packing at spot ploughing on dry soils was studied in a soil bin, and on loam soil in the field. The results show that in dry soil fragmentation by ploughing and packing is attained by tearing the natural clods from each other and by stressing and translocating them. The maximum bulk density after ploughing was about 964 kg m-3, after ploughing and packing was about 1071 kg m-3 . Packing considerably reduced soil surface roughness from about 0.12m to 0.04m. Moreover, packing by rolling increased soil fragmentation from about 68.2 % (after ploughing) to 79.8 %. A series of experiments showed that the roller had only a slight influence on draught resistance. The spot ploughing draught were increased about 1.3% at this operating conditions.

Anti-erosion technologies and technical means for tillage in the conditions of Uzbekistan

“…The combination of the work of the roller and flat-cutting bodies improves their stability at a small depth. After the passage of such a combined plow-ripper, 85-95% of plant residues remain on the soil surface, which significantly reduces the evaporation of soil moisture [3,8,15].…”

“…In the developed plow for smooth-stepped plowing [1][2][3], bodies 1 and 3 are located with an offset relative to each other, on which guide plates 2 and 4 are installed with working surfaces facing the screw plowshare-moldboard surfaces of the bodies (Fig. 1, d).…”

Computer simulation the moldboard's surface in simplex system

“…In many engineering problems, determining the center of gravity of the object under study is solved [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], [23]. Studies conducted on this problem also show that one of the parameters to be determined for a given cross-section of the formation is the position of the center of gravity of its contour, especially when choosing different options for changing the contour, since this leads to a change in the position of the center of gravity, respectively.…”

“…In particular, they are considered fundamental in the following scientists' works: V.P.Goryachkin, L.V.Gachev, G.N.Sineokov, I.M.Panov, and others [1][2][3][4]. In Uzbekistan, the issue was partially handled by R.I.Baymetov, A.T.Tuhtaquziev, F.M.Mamatov [5], etc. In these works, traditionally, problems were solved based on analytical and experimental methods.…”

Parameters of the angle-lift of the front plow for smooth, rowless plowing

“…V.Sakun [24,31,33], V.Sharov [32], Ya.Lobachevsky [26][27][28][29][30][31][32][33], S.Zolotarev [25], L.Kaufman [37], D. Totten [37], F.Mamatov , I.Ergashev were engaged in the development and improvement of ploughs for smooth, rowless plowing and research to substantiate the parameters of their working bodies [1,5,11,23,27], N.Aldoshin [2,9,10,18,19], H.Ravshanov [3,4,5,19] and others.…”