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Journal Article 1994

Autor: Hiernaux, Pierre H.Y. Leeuw, P.N. de Diarra, L.

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 ...

Enlace original: https://cgspace.cgiar.org/handle/10568/28095

Investigación en Agricultura
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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] ,  Modelling tillering of annual grasses as a function of plant density: Application to Sahelian rangelands productivity and dynamics
Journal Article 1995

Autor: Seen, D. lo Mougin, E. Rambal, S. Gaston, A. Hiernaux, Pierre H.Y.

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 ...

Enlace original: https://cgspace.cgiar.org/handle/10568/29554

Investigación en Agricultura
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Seen, D. lo ,  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] ,  A regional sahelian grassland model to be coupled with multispectral satellite data. II. Toward the control of its simulations by remotely sensed indices
Journal Article 1995

Autor: Mougin, E. Seen, D. lo Rumbal, S. Gaston, A. Hiernaux, Pierre H.Y.

An approach to combining remote sensing spectral measurements with an ecosystem process model is presented. In this approach, the ecosystem model is not bound by the sole use of satellite data, but integrates the latter in an explicit formulation of the main processes of vegetation functioning. A...

Enlace original: https://cgspace.cgiar.org/handle/10568/29553

Investigación en Agricultura
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Mougin, E. ,  Seen, D. lo ,  Rumbal, S. ,  Gaston, A. ,  Hiernaux, Pierre H.Y. ,  [A regional sahelian grassland model to be coupled with multispectral satellite data. I. Model description and validation] ,  A regional sahelian grassland model to be coupled with multispectral satellite data. I. Model description and validation
Journal Article 2003

Autor: Jarlan, L. Mazzega, P. Mougin, E. Lavenu, F. Marty, G. Frison, P.L. Hiernaux, Pierre H.Y.

The West African Sahel rainfall regime is known for its spatio-temporal variability at different scales which has a strong impact on vegetation development. This study presents results of the combined use of a simple water balance model, a radiative transfer model and ERS scatterometer data to ...

Enlace original: https://cgspace.cgiar.org/handle/10568/33134

Investigación en Agricultura
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Jarlan, L. ,  Mazzega, P. ,  Mougin, E. ,  Lavenu, F. ,  Marty, G. ,  Frison, P.L. ,  Hiernaux, Pierre H.Y. ,  [Mapping of Sahelian vegetation parameters from ERS scatterometer data with an evolution strategies algorithm] ,  Mapping of Sahelian vegetation parameters from ERS scatterometer data with an evolution strategies algorithm
Journal Article 2002

Autor: Jarlan, L. Mougin, E. Frison, P.L. Mazzega, P. Hiernaux, Pierre H.Y.

ERS wind scatterometer (WSC) time series are analyzed over different ecoclimatic regions of the African Sahel during the period 1991–1995. At 45° incidence angle, the strong seasonality of o time series can be directly linked to the successive wet and dry seasons. Moreover, the annual o dynami...

Enlace original: https://cgspace.cgiar.org/handle/10568/33133

Investigación en Agricultura
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Jarlan, L. ,  Mougin, E. ,  Frison, P.L. ,  Mazzega, P. ,  Hiernaux, Pierre H.Y. ,  [Analysis of ERS wind scatterometer time series over Sahel (Mali)] ,  Analysis of ERS wind scatterometer time series over Sahel (Mali)
Journal Article 1991

Autor: Franklin, J. Hiernaux, Pierre H.Y.

Predictions of tree size and density from a remote sensing model were used together with allometric regression equations from the literature to estimate foliage and above-ground woody biomass in sparse woodlands. Study sites with woody cover ranging from 10-50 per cent were located in the Sudania...

Enlace original: https://cgspace.cgiar.org/handle/10568/28808

Investigación en Agricultura
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Franklin, J. ,  Hiernaux, Pierre H.Y. ,  [Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model] ,  Estimating foliage and woody biomass in Sahelian and Sudanian woodlands using a remote sensing model
Journal Article 1986

Autor: Justice, C.O. Hiernaux, Pierre H.Y.

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.

Enlace original: https://cgspace.cgiar.org/handle/10568/28804

Investigación en Agricultura
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Justice, C.O. ,  Hiernaux, Pierre H.Y. ,  [Monitoring the grasslands of the Sahel using NOAA AVHRR data: Niger 1983] ,  Monitoring the grasslands of the Sahel using NOAA AVHRR data: Niger 1983
Journal Article 2005

Autor: Rovere, R. La Hiernaux, Pierre H.Y. Keulen, H. van Schiere, J.B. Szonyi, J.A.

Agricultural production in the semi-arid agro-ecosystems of the Sahel centres on cereal staple crops and pastoralism with increasing crop-livestock integration. Animals mobilize soil fertility through manure production, graze crop by-products, and transfer nutrients from distant pastures to crop...

Enlace original: https://cgspace.cgiar.org/handle/10568/30000

Investigación en Agricultura
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Rovere, R. La ,  Hiernaux, Pierre H.Y. ,  Keulen, H. van ,  Schiere, J.B. ,  Szonyi, J.A. ,  [Co-evolutionary scenarios of intensification and privatization of resource use in rural communities of south-western Niger] ,  Co-evolutionary scenarios of intensification and privatization of resource use in rural communities of south-western Niger
Conference Paper 2004

Autor: Rovere, R. La Hiernaux, Pierre H.Y. Keulen, H. van

In semi-arid south-western Niger, climatic variability, low productivity, poverty and institutional constraints limit the scope of agricultural production to meet the rising needs of the growing human population. The integration of crop and livestock production activities has long been seen as th...

Enlace original: https://cgspace.cgiar.org/handle/10568/49720

Investigación en Agricultura
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Rovere, R. La ,  Hiernaux, Pierre H.Y. ,  Keulen, H. van ,  [Options for intensification of mixed crop-livestock systems in rural communities of south-western Niger: Prospects and constraints] ,  Options for intensification of mixed crop-livestock systems in rural communities of south-western Niger: Prospects and constraints
Journal Article 1991

Autor: Hanan, N.P. Prince, S.D. Hiernaux, Pierre H.Y.

Certain landscapes in the Sahel and elsewhere consist of a 'checkerboard' arrangement of vegetated and non-vegetated areas in which there may be several spectrally distinct vegetation and bare ground components. When individual components form large spatially coherent patches, and the vertical di...

Enlace original: https://cgspace.cgiar.org/handle/10568/28809

Investigación en Agricultura
Enlace permanente
Hanan, N.P. ,  Prince, S.D. ,  Hiernaux, Pierre H.Y. ,  [Spectral modelling of multicomponent landscapes in the Sahel] ,  Spectral modelling of multicomponent landscapes in the Sahel

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