Get Conservation Tillage Systems and Water Productivity - PDF

By Melesse Temesgen Leye

ISBN-10: 0415439469

ISBN-13: 9780415439466

Conservation tillage structures were followed through farmers in lots of international locations to resolve the matter of land degradation and declining water productiveness. Direct software of such tillage platforms has no longer been attainable between resource-poor, smallholder farmers in semi-arid components of Ethiopia. difficulties akin to the shortcoming of rainfall, the prices of herbicides and implements, and the designated cultivation wishes of the crop tef, which could no longer be planted in rows, have constructed locally-adapted conservation tillage structures. This publication considers conventional tillage structures and the result of assessments performed on acceptable conservation tillage implements and structures for smallholder farmers in semi-arid areas of Ethiopia. the conventional tillage enforce, the Maresha Plough, and the comparable tillage platforms have been pointed out as being the most explanation for repeated and cross-ploughing, resulting in land degradation and lowered water productiveness. changed implements have been stumbled on to be appropriate for conservation tillage platforms whereas being uncomplicated, mild and cheap. different types of tillage platforms constructed for maize and tef have been stumbled on to lessen floor runoff, elevate availability of water to vegetation and elevate yields.

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Additional resources for Conservation Tillage Systems and Water Productivity - Implications for Smallholder Farmers in Semi-Arid Ethiopia: PhD, UNESCO-IHE Institute for Water Education, Delft, The Netherlands

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The V-shaped furrow exposes a larger surface area of the soil to the atmosphere. Rough surfaces appearing during primary tillage operations enhance gas exchanges CO2 (Reicosky, 2001) resulting in losses of organic carbon. Moreover, evaporation losses are higher due to larger surface area exposure. Research to improve The Maresha plow began as early as 1939 when the Italians introduced the animal drawn mould board plow (Goe, 1987). FAO (Food and Agriculture Organization) conducted a series of on-farm trials on implements in the 1950s while the Alemaya and the Jimma Agricultural Colleges made efforts to improve the traditional tillage implement in the early 1960s.

Hence, the main concern has been the high number of tillage operations carried out with the Maresha plow. As a result, conservation tillage or minimum tillage in Ethiopia was regarded as reducing the number of tillage operations while using the same traditional tillage implement. , 1999) reported lower grain yields from minimum tillage treatments. Georgis and Sinebo, (1993) reported that in a trial conducted at Bako during 1982-86, maize grain yields were consistently higher with traditional tillage compared to minimum tillage.

If plowing is delayed further, the soil will be too dry thus resulting in excessive pulverization that will lead to compaction by subsequent rain. According to farmers, tillage carried out at the right time reduces the bulk density of soils for increased infiltration from the following rains with less compaction and reduces evaporation thereby improving soil moisture. 4. Farmers' perceived purpose of tillage at different stages (% of farmers) Time tillage Primary tillage Secondary tillage Tillage at planting of Purpose of tillage Maize Melkaw Wulin oba chity Tef Melka woba Wulinc hity Weed control Initiate weed germination Moisture conservation Soil warm-up Manure incorporation 98 98 98 92 100 100 98 60 72 84 38 18 96 98 98 28 82 82 52 58 Weed control Initiate weed germination Moisture conservation Soil warm-up Manure incorporation 98 94 96 90 98 98 98 60 80 86 44 56 96 98 96 50 84 80 38 60 Seed covering Weed control Initiate weed germination Moisture conservation Soil warm-up Manure incorporation 100 100 100 68 72 98 62 66 60 78 62 98 36 72 48 50 98 98 28 98 66 84 24 52 Guzha (2004) attributed the effect of tillage to increased soil roughness that increased surface area for water storage.

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Conservation Tillage Systems and Water Productivity - Implications for Smallholder Farmers in Semi-Arid Ethiopia: PhD, UNESCO-IHE Institute for Water Education, Delft, The Netherlands by Melesse Temesgen Leye


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