This paper attempts to demonstrate the importance of livestock in African Agriculture through an analysis of the major factors affecting livestock density and species composition. In the zonal analysis, the general distribution patterns have been summarised by subdividing the continent into five ...
Leeuw, P.N. de
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Rey, B.
,
[Analysis of current trends in the distribution patterns of ruminant livestock in tropical Africa]
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Analysis of current trends in the distribution patterns of ruminant livestock in tropical Africa
This paper addresses issues surrounding measurment of the potential productivity gains from new livestock technologies and the returns to international livestock research. The approach, applicable to many livestock production constraints and technologies, uses geographic information systems (GIS)...
Kristjanson, Patricia M.
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Swallow, B.M.
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Rowlands, G.J.
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Kruska, R.L.
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Leeuw, P.N. de
,
[Measuring the costs of African animal trypanosomosis, the potential benefits of control and returns to research]
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Measuring the costs of African animal trypanosomosis, the potential benefits of control and returns to research
Describes methods used to determine the voluntary intake, grazing behaviour & productivity of livestock in sedentary or semi-transhumant grazing systems of the Malian Sahel, defining relations between intake & some environmental factors, & relating some of the results obtained to other ecological...
Dicko, M.S.
,
Lambourne, L.J.
,
Leeuw, P.N. de
,
Haan, C. de
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[Ingestion volontaire et productivite du betail dans diverses zones ecologiques de l'Afrique]
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Ingestion volontaire et productivite du betail dans diverses zones ecologiques de l'Afrique
Rappel des objectifs, resultats et methodes du suivi de la vegetation sahelienne du Gourma mis en place depuis juin 1984 au Mali; suivi d'une presentation et d'une analyse sommaire des resultats de la saison 1990 concernant la dynamique de la vegetation apre secheresse; avec ref. partic. sur la b...
Hiernaux, Pierre H.Y.
,
Diarra, L.
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Leeuw, P.N. de
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[Dynamique de la vegetation sahelienne apres secheresse. Un bilan du suivi des sites pastoraux du Gourma en 1990]
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Dynamique de la vegetation sahelienne apres secheresse. Un bilan du suivi des sites pastoraux du Gourma en 1990
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
,
[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
,
Thorpe, W.R.
,
[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
,
[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
Describes West African transhumant pastoralism, briefly analysing major characteristics of this mode of production, reviews differences in land tenure & farm size, livestock holdings, labour intensity, income & level of technical knowledge of African pastoral & cropping systems, and assesses appl...
Describes methods used to determine the voluntary intake, grazing behaviour & productivity of livestock in sedentary or semi-transhumant grazing systems of the Malian Sahel, defining relations between intake & some environmental factors, & relating some of the results obtained to other ecological...
Dicko, M.S.
,
Lambourne, L.J.
,
Leeuw, P.N. de
,
Haan, C. de
,
[Voluntary intake and livestock productivity in different ecological zones of Africa]
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Voluntary intake and livestock productivity in different ecological zones of Africa
Up to the 1950s constraints of feed shortages for livestock were outweighed by those of disease, concern over looming imbalances between supply and demand of grazing resources led to large investments in projects of water Development, many of which were financed by foreign aid. This provision of ...
Leeuw, P.N. de
,
Tothill, J.C.
,
[The concept of rangeland carrying capacity in sub-Saharan Africa - myth or reality]
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The concept of rangeland carrying capacity in sub-Saharan Africa - myth or reality