Results 221 to 230 of about 3,488 (265)

Influence of the ploughing effect on the vibratory drilling behaviour

International Journal of Machining and Machinability of Materials, 2008
The poor removal of chips in deep drilling of small diameter is often the cause of tool breakage and poor quality surface. The vibratory drilling enables the chip to be split thanks to the axial vibrations of the drill, self-maintained by the cutting energy. Thus, chips are then evacuated easily.
Guibert, Nicolas, Paris, Henri
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The effect of soil compaction on mole plough draught

Soil and Tillage Research, 1994
Abstract Conventional and zero traffic systems were mole ploughed and effects on soil physical properties were compared. Draught of the plough operating at 550 mm depth was measured while it was winched across plots having a 5-year history of different traffic regimes.
W.C.T. Chamen, R. Cavalli
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Migration of solutes in a cultivated soil: Effect of ploughing

Geoderma, 1986
Abstract The vertical transport of solutes in a cultivated soil, which is ploughed annually, was investigated by model calculations. Ploughing was simulated in two ways: “mixing” (homogeneous distribution of the solute in the A p -horizon) and “turnover” (inversion of the solute distribution). During the first years after application of the solute to
W. Schimmack, K. Bunzl
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Abrasive wear resistance: the effects of ploughing and the removal of ploughed material

Wear, 1987
Abstract In an earlier paper it was suggested that the wear resistance of a metal would be proportional to H s /(1−ƒ p ) where H s is the hardness of the wear surface and 1− ƒ p is the fraction of a wear groove removed from the wear surface.
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Effect of enamel coating on the performance of a disc plough

Journal of Agricultural Engineering Research, 1992
The effect of enamel coating on the specific draught requirements of a disc plough in a stubbled paddy field was studied. A steel-sheet disc-shaped plate was fabricated for mounting on a disc of the plough and coated with enamel. The performance of a disc plough with and without this plate was evaluated.
V.M. Salokhe, A.K.M. Shirin
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Speed effects in cutting and ploughing

Géotechnique, 1999
A significant speed effect occurs when blades and ploughs cut saturated soil. The cutting force increases dramatically with cutting speed, sometimes by a factor of five or more. In some soils, the effect occurs at very low speeds. It has significant practical implications, and has caused difficulties in several projects. The effect is explained by the
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Effects of furrow packing at ploughing on light soils

Soil and Tillage Research, 1990
Abstract Mechanical reconsolidation by packing at ploughing on light soils was studied on sand in a soil bin, and on reclaimed peat soil in the field. Packing increased soil bulk density in the whole arable layer, but the maximum increase was found at an average depth of 0.11 m. The maximum bulk density after packing was about 1300 kg m−3 on sand and
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The effect of non-ploughing on cereal diseases

Outlook on Agriculture, 1975
The change from orthodox cultivation to non-plough husbandry may influence the incidence of cereal diseases by its effects on the availability of inoculum of the responsible pathogens, the susceptibility of the host plants and the suitability of the environment for disease development.
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EFFECT OF PLOUGHING AND DIRECT DRILLING ON SOIL NITRATE CONTENT

Journal of Soil Science, 1975
Summary The concentration of nitrate‐N at 30 cm depth in a clay soil was 2–5 times greater (p<.05) after ploughing than after direct drilling during the winter and spring of 1972–3. However, by early May no significant differences could be detected between cultivation treatments.
R. J. DOWDELL, R. Q. CANNELL
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Effect of mouldboard and chisel ploughing and their timing on seedbed quality

Soil and Tillage Research, 1986
Abstract The effects of tillage on weed growth are supposed to depend largely on the type of implement, the timing of the operation and the type of soil. Experiments on the effect of mouldboard and chisel ploughing with duckfeet, used for the main tillage operation and the timing of the main tillage operation on seedbed quality and weed development ...
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