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- W2034603898 abstract "Under semi-arid conditions the limited availability of water is the primary constraint to effective crop production and the use of tillage practices that do not conserve water often result in crop failure. Population and economic pressures in the developing world mean that the desired resources and time are not generally available for long-term tillage experiments. A simple diagnostic approach is therefore needed to highlight the priority requirements for seedbed preparation. Findings of a four-season dryland tillage study on sandy loam soils in Botswana and those of simplified trials on Vertisols in Sudan are discussed. Dense sandy loams need some loosening to enhance water infiltration and allow effective growth of crop roots. In contrast, the Vertisols did not impede root elongation, and the control of weeds is the primary purpose of field preparation; this can be done with shallow tillage or the use of herbicides. This paper demonstrates that the identification of technical factors that are critically limiting to crop growth will allow practical results to be achieved without the need for long-term and complicated experiments. It concludes that observation of the development of mature crop root systems will readily and reliably provide qualitative measurement of soil physical factors thereby enabling the agriculturalist to prescribe appropriate tillage practices." @default.
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- W2034603898 date "1984-01-01" @default.
- W2034603898 modified "2023-09-28" @default.
- W2034603898 title "Tillage requirements in relation to soil type in semi-arid rainfed agriculture" @default.
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- W2034603898 doi "https://doi.org/10.1016/s0021-8634(84)80033-5" @default.
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