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Diarra, L.Hiernaux, Pierre H.Y.[Croissance des herbacees saheliennes. Suivi de l'evolution de la structure et de la biomasse de quelques paturages du ranch de Niono (Mali) au cours de la saison des pluies 1983]Croissance des herbacees saheliennes. Suivi de l'evolution de la structure et de la biomasse de quelques paturages du ranch de Niono (Mali) au cours de la saison des pluies 1983

Compte rendu de la mission CIPEA/NASA de reconnaissance dans la zone pastorale du Niger en vue de developper un programme d'alerte precoce. Propositions d'une typologie phytoecologique des parcours et d'une phase experimentale de developpement d'un systeme d'alerte precoce pastoral.


Hiernaux, Pierre H.Y.[Note sur les ressources fourrageres de la zone pastorale au Niger central, une reconnaissance de terrain et des propositions pour la mise en place d'un systeme d'alerte precoce experimental]Note sur les ressources fourrageres de la zone pastorale au Niger central, une reconnaissance de terrain et des propositions pour la mise en place d'un systeme d'alerte precoce experimental

A greenhouse trial was carried out at the International Crop Research Institute for the Semi-Arid Tropics (ICRISAT), at Sadore (13°15' N, 2°18'E), Niger. Experiments were conducted in conjunction with a feeding trial. The feeding trial yielded eight types of compost made from faeces and leftove...


Sangare, M.Bationo, B. AndréHiernaux, Pierre H.Y.Fernández Rivera, S.Pandey, V.S.[Effect of type and level of roughage offered to sheep and urine addition on compost quality and millet growth and production in the Sahel]Effect of type and level of roughage offered to sheep and urine addition on compost quality and millet growth and production in the Sahel

The influence of 0, 60 or 120 min access to a grove of either Ziziphus mauritiana (Ziziphus) or Combretum aculeatum (Combretum) on forage intake and on the digestibility, growth and excretion of nutrients was determined using 40 Oudah rams grazing for 7 h/day on poor-quality dry season pasture in...


Sangare, M.Fernández Rivera, S.Hiernaux, Pierre H.Y.Pandey, V.S.[The effect of supplementation with fresh browse of Ziziphus mauritiana or Combretum aculeatum on feed intake, nitrogen utilization and growth of grazing range sheep]The effect of supplementation with fresh browse of Ziziphus mauritiana or Combretum aculeatum on feed intake, nitrogen utilization and growth of grazing range sheep

This conference was conducted to review the development of crop-livestock farming systems in West Africa over the preceding two decades with particular reference to the constraints, productivity, livelihood and environmental impacts; to assess future trends and determine new opportunities for sus...


Williams, Timothy O.Tarawali, Shirley A.Hiernaux, Pierre H.Y.Fernández Rivera, S.[Sustainable crop-livestock production for improved livelihoods and natural resource management in West Africa. Proceedings of an international conference]Sustainable crop-livestock production for improved livelihoods and natural resource management in West Africa. Proceedings of an international conference

Little is known about the residual effects of crop residue (CR) and phosphorus (P) application on the fallow vegetation following repeated cultivation of pearl millet [Pennisetum glaucum (L.) R. Br.] in the Sahel. The objective of this study, therefore, was (i) to measure residual effects of CR, ...


Gerard, Bruno G.Hiernaux, Pierre H.Y.Muehlig-Versen, B.Buerkert, Andreas[Destructive and non-destructive measurements of residual crop residue and phosphorus effects on growth and composition of herbaceous fallow species in the Sahel]Destructive and non-destructive measurements of residual crop residue and phosphorus effects on growth and composition of herbaceous fallow species in the Sahel

Improved understandings of the agricultural and range ecologies of semi-arid Africa require better information on the spatiotemporal distribution of domestic livestock across agropastoral landscapes. An empirical GIS-based approach was developed for estimating distributions of herded livestock a...


Turner, M.D.Hiernaux, Pierre H.Y.[The use of herders' accounts to map livestock activities across agropastoral landscapes in Semi-Arid Africa]The use of herders' accounts to map livestock activities across agropastoral landscapes in Semi-Arid Africa

Poor cropland fertility and a rapidly rising demand for food force Sahelian farmers to cultivate more land and shorten fallow periods. This mostly leads to a gradual decline in crop yields per hectare, which can be counterbalanced by the systematic use of livestock manure on cropland. To assess t...


Schlecht, E.Hiernaux, Pierre H.Y.Achard, F.Turner, M.D.[Livestock related nutrient budgets within village territories in western Niger]Livestock related nutrient budgets within village territories in western Niger

The effects of grazing by livestock on plant species composition and spatial distribution have been studied at Sadoré, Niger. Herbaceous species were recorded in plots of increasing size from 1/64 to 1024 m2 in ten fallow plots subjected to five different grazing treatments over the previous thr...


Hiernaux, Pierre H.Y.[Effects of grazing on plant species composition and spatial distribution in rangelands of the Sahel]Effects of grazing on plant species composition and spatial distribution in rangelands of the Sahel

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 ...


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

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