The impact of human endeavours on the environment in the struggle to eke out a living through crop and animal agriculture is examined in a holistic context. Analyses focus on all the sources of pressure that modify the vegetation cover of rural Africa, including the effects of fires and burning o...
Leeuw, P.N. de
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Reid, Robin S.
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[Impact of human activities and livestock on the African environment: An attempt to partition the pressure]
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Impact of human activities and livestock on the African environment: An attempt to partition the pressure
Leeuw, P.N. de
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Nyambaka, R.
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[The prediction of rangeland production from rainfall data in arid and semi-arid eastern Africa]
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The prediction of rangeland production from rainfall data in arid and semi-arid eastern Africa
This paper deals with foraging behaviour of cattle grazing semi-arid rangelands in the Sahel of Mali. It discusses the location of study site, vegetation in the grazing orbit, herd management and livestock behaviour. Results on seasonal variation in feed supply, selection of the annual grazing or...
Diarra, L.
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Hiernaux, Pierre H.Y.
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Leeuw, P.N. de
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[Foraging behaviour of cattle grazing semi-arid rangelands in the Sahel of Mali]
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Foraging behaviour of cattle grazing semi-arid rangelands in the Sahel of Mali
Presents procedures for feed budgeting and allocation developed to access the quantity and quality of all feed components and to determine the production goals of each enterprise and allocates feed in relation to their requirements within the framework of overall feed supplies. Examines land, cro...
In the Sahelian rangelands biomass production is constrained by soil moisture in the drier (100-250 mm) parts and by soil nutrients in the wetter parts. Similarly, for a given Sahelian range, nutrient deficiency would be more prominent in good than in poor rainfall years. To test this hypothesis,...
Hiernaux, Pierre H.Y.
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Leeuw, P.N. de
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Diarra, L.
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[The interactive effects of rainfall, nutrient supply and defoliation on the herbage yields of Sahelian rangelands in north-east Mali]
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The interactive effects of rainfall, nutrient supply and defoliation on the herbage yields of Sahelian rangelands in north-east Mali
Tessema, S.
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Emojong, E.E.
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Maluti, M.
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Leeuw, P.N. de
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[A strategy of livestock research adapted to semi-arid small-scale mixed farming system - The Katumani experience]
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A strategy of livestock research adapted to semi-arid small-scale mixed farming system - The Katumani experience
Presents a comparative evaluation of population estimates based on data from ground and aerial surveys for a number of districts for which contemporary records are available. Gives an exploratory analysis of aerial surveys in six northern districts to detect trends in livestock populations over t...
Leeuw, P.N. de
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[Livestock populations in Kenyan rangelands: An analysis of trends using census and aerial survey data]
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Livestock populations in Kenyan rangelands: An analysis of trends using census and aerial survey data
The biological productivity of cow-calf units in low-input production systems in tropical Africa is reviewed. Four production systems (pastoralists agropastoralists, crop-livestock farmers and smallholder farmers) are identified. Fifty-five data sets from monitoring and systems research conducted...
Leeuw, P.N. de
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Thorpe, W.R.
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[Low input cattle production systems in tropical Africa: An analysis of actual and potential cow-calf productivity]
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Low input cattle production systems in tropical Africa: An analysis of actual and potential cow-calf productivity
Reports on a study carried out by ILCA in Kenya, on the Maasai pastoral system with ref. to providing milk primarily for calves & secondly for human subsistence. Notes the systems better level of productivity as compared to other pastoral systems in Africa due to its low calf mortality, better ca...
Semenye, P.P.
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Leeuw, P.N. de
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[Milk for calves or man in a Maasai pastoral system in East Africa]
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Milk for calves or man in a Maasai pastoral system in East Africa