Plant density and tiller cunts were done in several Sahelian rangelands in Mali, under a variety of soil, rainfall and grazing situations. Numeric models were developed to explain the dynamic relationship between grass tillering and herb density. Tests of application of these models to the plant ...
Hiernaux, Pierre H.Y.
,
Leeuw, P.N. de
,
Diarra, L.
,
[Modelling tillering of annual grasses as a function of plant density: Application to Sahelian rangelands productivity and dynamics]
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Modelling tillering of annual grasses as a function of plant density: Application to Sahelian rangelands productivity and dynamics
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
Research agenda for ILCA's Kenya programme, including details of objectives, programme of work, time schedule, data evaluation procedures and expected benefits for each research component to improve livestock productivity of pastoralists and systems research to improve mixed farming systems, both...
Bekure, S.
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Leeuw, P.N. de
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Pasha, I.K.O.
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Tessema, S.
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Woie, B.M.
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Maranga, E.K.
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Shaabani, S.B.
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[Proposed research programme and research protocols for 1986-1989]
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Proposed research programme and research protocols for 1986-1989
The first chapter gives a brief description of a pastoral production system, as envisaged by the study team and outlines the multi-disciplinary approach of the study, its sampling design and the data collected. Chapters 2 & 3 describe Kenya's biophysical and socio-economic environments, within wh...
Bekure, S.
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Leeuw, P.N. de
,
Grandin, B.E.
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Neate, Paul J.H.
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[Maasai herding: An analysis of the livestock production system of Maasai pastoralists in eastern Kajiado District, Kenya]
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Maasai herding: An analysis of the livestock production system of Maasai pastoralists in eastern Kajiado District, Kenya
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.
,
Hiernaux, Pierre H.Y.
,
Leeuw, P.N. de
,
[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
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.
,
Leeuw, P.N. de
,
Diarra, L.
,
[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
A document prepared on the basis of past work conducted and discussions held by scientists of two institutions, ILCA & KARI (Kenya Agricultural Research Institute). It aims to provide background information that explains the nature of this project in order to facilitate preparation of specific re...
Solomon Bekure
,
Leeuw, P.N. de
,
[Proposal for collaborative research project between the Kenya Agricultural Research Institute and the International Livestock Centre for Africa]
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Proposal for collaborative research project between the Kenya Agricultural Research Institute and the International Livestock Centre for Africa