Discusses intermediate technology for increased food and feed production from deep black clay soils (vertisols) in the Ethiopian highlands. Presents examples of improved soil/water/nutrient management on vertisols discussing tillage and animal powered surface drainage and its effect on crop yield...
Jutzi, S.C.
,
Asamenew, G.
,
Tedla, A.
,
Astatke, A.
,
[Intermediate technology for increased food and feed production from deep black clay soils in the Ethiopian highlands]
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Intermediate technology for increased food and feed production from deep black clay soils in the Ethiopian highlands
Crop livestock production systems in Africa are constrained by wide fluctuations in the quality and quantity of feed resources during the year and by the low availability of nutrients, especially nitrogen and phosphorus, in most soils, which threatens the sustainability of primary production. In ...
Haque, I.
,
[Use of legume biological nitrogen fixation in crop/livestock production systems]
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Use of legume biological nitrogen fixation in crop/livestock production systems
Mamo, T.
,
Tedla, A.
,
Erkossa, Teklu
,
[The effect of undersowing wheat with clovers on wheat grain yield, total crop residue yield and nutritive value of straw and fodder grown on Vertisols in Ethiopia]
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The effect of undersowing wheat with clovers on wheat grain yield, total crop residue yield and nutritive value of straw and fodder grown on Vertisols in Ethiopia
Sahile, G.
,
Tedla, A.
,
[The effect of weeding practices on grain yields of Durum wheat under two drainage conditions of a Vertisol in the Ethiopian highlands]
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The effect of weeding practices on grain yields of Durum wheat under two drainage conditions of a Vertisol in the Ethiopian highlands
This paper highlights some interventions which might alleviate agricultural pressures on steep slopes and reduce land degradation in parts of the Ethiopian Highlands. The Ethiopian highlands are losing alarming amounts of soils (estimated at more than one billion, 1000 million, tonnes) annually. ...
El Wakeel, A.
,
Astatke, A.
,
[Intensification of agriculture on Vertisols to minimize land degradation in parts of the Ethiopian highlands]
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Intensification of agriculture on Vertisols to minimize land degradation in parts of the Ethiopian highlands
Outlines an economic evaluation of an improved surface drainage technology, using the broad-bed-maker (BBM) on-farm in four different vertisol areas of the Ethiopian highlands. Presents data on crops and number of areas covered for the on-farm drainage technology, on cost structure of the BBM, an...
Asamenew, G.
,
Jutzi, S.C.
,
Tedla, A.
,
McIntire, John M.
,
[Economic evaluation of improved vertisol drainage for food crop production in the Ethiopian highlands]
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Economic evaluation of improved vertisol drainage for food crop production in the Ethiopian highlands
This chapter reviews relevant Vertisol properties, experimental results and the overall experience of the project on this subject. There are several types of drainage problems in Vertisols whose magnitude may vary from site to site. Drainage improvement is discussed in relation with camber beds, ...
Some of the papers in this report deals with nutrient management; land, soil and water management; grain, fodder and residue management; and technology validation and transfer. The other papers looks into development of coordinated research efforts; distribution and importance of Ethiopian vertis...
Mamo, T.
,
Astatke, A.
,
Srivastava, K.L.
,
Dibabe, A.
,
[Improved management of vertisols for sustainable crop-livestock production in the Ethiopian highlands: Synthesis report 1986-92]
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Improved management of vertisols for sustainable crop-livestock production in the Ethiopian highlands: Synthesis report 1986-92
This chapter describes the distribution, use and importance of Vertisols in Ethiopia and indicates the study sites of the Joint Vertisol Project. Land and soil features are examined with particular reference to parent materials and landscape features, soil characterisation (colour, texture and de...
Srivastava, K.L.
,
Abebe, M.
,
Astatke, A.
,
Haile, M.
,
Regassa, H.
,
[Distribution and importance of Ethiopian vertisols and location of study sites]
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Distribution and importance of Ethiopian vertisols and location of study sites
A study was conducted to assess the impact of agricultural land use history on macro-aggregate (4.0–4.8 mm) stability in the 0–5 cm layers of Chromic and ‘Hydromorphic’ Vertisols in north Cameroon. Macroaggregate stability to water drop impact was determined and the ASI50 index calculated. Macroa...
Obale‐Ebanga, F.
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Sevink, J.
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Groot, W. de
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Nolte, C.
,
[Myths about slash and burn in physical degradation of savanna soils: impacts on Vertisols in north Cameroon]
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Myths about slash and burn in physical degradation of savanna soils: impacts on Vertisols in north Cameroon