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
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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
An approach for combining remote sensing spectral measurements with an ecosystem model was presented in an accompanying article. The sahelian grassland ecosystem STEP model developed for that purpose was also described and validated. In order to fulfill a prerequisite for using coarse resolution ...
Seen, D. lo
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Mougin, E.
,
Rambal, S.
,
Gaston, A.
,
Hiernaux, Pierre H.Y.
,
[A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices]
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A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices
Sample sites of 'brousse tigree' and related vegetation types are described for Mali and Niger. Species composition and physical structure of the herbaceous layer as well as woody plant population were recorded at all sites together with data on soils and natural resource management. Herbage yiel...
Hiernaux, Pierre H.Y.
,
Gerard, Bruno G.
,
[The influence of vegetation pattern on the productivity, diversity and stability of vegetation: The case of 'brousse tigree' in the Sahel]
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The influence of vegetation pattern on the productivity, diversity and stability of vegetation: The case of 'brousse tigree' in the Sahel
Compares normalized difference vegetation index data derived from the advanced very high resolution radiometer on board the NOAA-7 satellite for the 1983 growing season for the saheliant zone of Niger wit biomass estimates derived from an emperical grassland productivity model.
Justice, C.O.
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Hiernaux, Pierre H.Y.
,
[Monitoring the grasslands of the Sahel using NOAA AVHRR data: Niger 1983]
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Monitoring the grasslands of the Sahel using NOAA AVHRR data: Niger 1983
Growing pearl millet and cowpea in combination with raising ruminant livestock is widely practiced in the Sahel. In this farming system, livestock feeding depends mostly on rangeland, fallows and cropland grazing. Nutritional constraints to grazing ruminants stem primarily from feed scarcity and ...
Fernández Rivera, S.
,
Hiernaux, Pierre H.Y.
,
Williams, Timothy O.
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Turner, M.
,
Schlecht, E.
,
Salla, A.
,
Ayantunde, Augustine A.
,
Sangare, M.
,
[Nutritional constraints to grazing ruminants in the millet-cowpea- livestock farming system of the Sahel]
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Nutritional constraints to grazing ruminants in the millet-cowpea- livestock farming system of the Sahel