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- W2742495712 abstract "Abstract Farmers' use of tillage implements under extremely dry soil conditions, ignoring optimum soil moisture conditions, results in low field efficiency, high fuel consumption and ultimately poor soil structure. Accordingly, the effect of tillage, applied under a range of near-plastic-limit soil moisture contents, on the efficiency of conventional tillage implements and subsequent soil structure, was investigated. Two conventional tillage systems: (i) moldboard plough followed by two cultivator passes and (ii) disk plough followed by two cultivator passes, were factorially combined with four soil moisture contents ( θ ) at tillage: dry soil, θ = 5.0% w/w, and at 70, 80 and 90% of the moisture content at the soil's plastic limit (0.7 θ pl , 0.8 θ pl and 0.9 θ pl , respectively). The lowest field efficiency was observed under dry conditions, with a significant increase in efficiency at 0.7 θ pl , a further increase at 0.8 θ pl , and a subsequent decrease, compared to 0.7 θ pl and 0.8 θ pl , at 0.9 θ pl . Similarly, fuel consumption was greatest under dry conditions, decreasing at 0.7 θ pl and 0.8 θ pl , only to increase again at 0.9 θ pl . Overall, the lowest fuel consumption occurred at 0.8 θ pl . Under dry soil conditions the proportion of large aggregates (> 8 mm) was the lowest and that of small aggregates ( θ pl the converse was the case. At 0.7 θ pl and 0.8 θ pl , the proportions of large and small aggregates were low, while the proportion of desirable aggregates was greatest. At 0.8 θ pl the proportion of medium aggregates was greater than that at 0.7 θ pl . Therefore, in terms of post-tillage soil structure 0.8 θ pl was deemed the optimum θ for tillage of a silty loam soil. The aggregate stability of soil was higher under dry conditions and 0.7 θ pl , and lower at 0.8 θ pl and 0.9 θ pl under both moldboard and disk ploughing. A somewhat similar trend was observed under both conventional tillage implements; however, the disk plough followed by two cultivator passes offered a better performance in terms of field efficiency and soil properties than did the moldboard plough followed by two cultivator passes." @default.
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- W2742495712 date "2017-11-01" @default.
- W2742495712 modified "2023-09-23" @default.
- W2742495712 title "Assessment of implement efficiency and soil structure under different conventional tillage implements and soil moisture contents in a silty loam soil" @default.
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- W2742495712 doi "https://doi.org/10.1016/j.catena.2017.07.017" @default.
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