Results 231 to 240 of about 3,488 (265)

Effect of tractor weight, depth of ploughing and wheel placement during ploughing in an organic cereal rotation on contrasting soils

Soil and Tillage Research, 2009
Abstract The relative effects of using light (2–3 Mg) versus heavier (5–7 Mg) tractors, shallow (15 cm) versus deeper (25 cm) ploughing and on-land versus in-furrow wheel placement during ploughing were investigated from 2003 to 2006 in organic rotations (wheat or barley, green manure, oats with peas) and conventionally fertilized barley. Trials were
A.K. Bakken, L.O. Brandsæter, R. Eltun, S. Hansen, K. Mangerud, R. Pommeresche, H. Riley   +6 more
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Effect of enamel coating on the field performance of a mouldboard plough

Soil and Tillage Research, 1992
Abstract Experiments were conducted in a stubbled paddy field with clay soil to determine the effect of enamel coating on the draft of a mouldboard plough. An enamel-coated plate of mouldboard shape was fabricated, and the performance of a mouldboard plough with and without this plate was evaluated for soil with averages of 24.1%, 28.4% and 32.8% dry
V.M. Salokhe, null Suharno, D. Gee-Clough   +2 more
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Effects of No-Tillage and Ploughing on Roots of Maize and Leguminous Crops

Experimental Agriculture, 1980
SUMMARYRoot development of maize (Zea mays), soyabean (Glycine max), cowpea (Vigna unguiculata), and pigeonpea (Cajanus cajan) was investigated with and without tillage. Observations were made at different growth stages by digging trenches normal to the rows, by core sampling, and by observing growth of roots against glass windows.
P. R. Maurya, R. Lal
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Effects of Ploughing Forces and Friction Coefficient in Microscale Machining

Journal of Manufacturing Science and Engineering, 2006
This paper discusses the effects of ploughing and friction in microscale machining. The friction coefficient has previously been shown to be sensitive to the geometry of the abrasive particle and the depth of indentation. From a micromachining standpoint, the friction coefficient is modeled to be a function of the tool edge radius and the undeformed ...
Siva Venkatachalam, Steven Y. Liang
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Effects of uniaxial compaction on aeration and structure of ploughed or direct drilled soils

Soil and Tillage Research, 1994
Abstract Cores of intact soil and of soil aggregates in the field condition were compacted uniaxially in the laboratory in a series of progressive increments of stress. Before compaction and after each increment of stress, air-filled porosity, relative diffusivity, diffusion time delay and air permeability were measured.
Ball, BC, Robertson, EAG
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Effect of speed on trajectory of penetration of a trailed mouldboard plough

Soil and Tillage Research, 1992
The effect of variation of ploughing speed on the penetration path of a trailed three-furrow mouldboard plough was studied. Experiments were made in two fields of different soil conditions (loosened and moderately compacted). The range of speed used was 0.15–1.6 m s−1.
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Chatter in Turning Process Incorporating the Effect of Ploughing Force

Volume 7B: 17th Biennial Conference on Mechanical Vibration and Noise, 1999
Abstract In this paper, the stability analysis of turning process is performed based on a new cutting force model which includes the effect of ploughing force. This approach utilized the Laplace transform to identify the characteristic roots of the examined machining system. The stability of the machining system can then be determined by
Z. C. Wang, W. L. Cleghorn, S. D. Yu
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An Enhanced Dynamic Model in Turning Including the Effect of Ploughing Forces

Journal of Manufacturing Science and Engineering, 1997
In this paper computer simulation of cutting process dynamics in turning, using a mechanistic cutting force model, is significantly enhanced by incorporating a dynamic ploughing force model. The ploughing forces are decomposed into static and dynamic components.
A. M. Shawky, M. A. Elbestawi
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The effect of time of ploughing on the yield and quality of flue-cured tobacco

Izvješće o znanstvenom i stručnom radu u ... godini, 1990
The effect of time of ploughing on the yield and quality of flue-cured tobacco was studied from 1986 to 1989 at the Experimental Station of Tobacco Institute, Zagreb in Pitomaca. The trial soil was luvisol, of acid reaction, with a low content of colloids and organic matter.
Turšić, Ivan, Čavlek, Miroslav, Vuletić, Nikola   +2 more
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The effects of very deep ploughing and of subsoiling on crop yields

The Journal of Agricultural Science, 1956
1. Deep tillage, namely, ploughing to a depth exceeding 12 in., or subsoiling to a depth of about 18 in., increased crop yields on about half the fields in which an experiment was made. Unfortunately, it was not possible to recognize what was the difference in soil properties between the 50% of fields that responded appreciably to deep tillage and the ...
openaire   +1 more source