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Jamnadass, Ramni H.Mace, E.S.Hiernaux, Pierre H.Y.Muchugi, A.Hanson, Jean[Population genetic responses of wild forage species to grazing along a rainfall gradient in the Sahel: A study combining phenotypic and molecular analyses]Population genetic responses of wild forage species to grazing along a rainfall gradient in the Sahel: A study combining phenotypic and molecular analyses

A survey was conducted from February to June of 1997 among livestock herders in two villages of Niger, Kodey and Toukounous, on their perceptions, practice, and problems of night grazing. Cattle and sheep were the species that were taken out for night grazing by the herders. Small herd size an...


Ayantunde, Augustine A.Williams, Timothy O.Udo, H.M.J.Fernández Rivera, S.Hiernaux, Pierre H.Y.Keulen, H. van[Herders' perceptions, practice, and problems of night grazing in the Sahel: Case studies from Niger]Herders' perceptions, practice, and problems of night grazing in the Sahel: Case studies from Niger

Sixty-four Azawak male weaned calves were allotted to eight treatments (T) in two trials to study the effect of timing (day or day-and-night) and duration of grazing on diet selection, faecal output, eating time, forage intake and weight changes. Grazing time during the day was 6 h for T 1, 2 and...


Ayantunde, Augustine A.Fernández Rivera, S.Hiernaux, Pierre H.Y.Keulen, H. vanUdo, H.M.J.Chanono, M.[Effect of timing and duration of grazing of growing cattle in the West African Sahel on diet selection, faecal output, eating time, forage intake and live-weight changes and nutrition and performance of cattle]Effect of timing and duration of grazing of growing cattle in the West African Sahel on diet selection, faecal output, eating time, forage intake and live-weight changes and nutrition and performance of cattle

L'effet de differents types d'amendements associes ou non au parcage nocturne de bovins dans le champ, et celui de 1'application de furrier sur la production de mil et la fertilite du sol ont ete etudies. Laugmentation des rendements du mil dans le traitement paillage associe au parcage est expli...


Sangae, M.Fernández Rivera, S.Bationo, B. AndréHiernaux, Pierre H.Y.Pandey, U.S.[Effect de differents types d'amendements sur le rendement du nil et la fertilite du sol au Sahel]Effect de differents types d'amendements sur le rendement du nil et la fertilite du sol au Sahel

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...


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

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.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

Sxity-four Azawak male calves were used to study the effect of nocturnal grazing (NG) and supplementation (S) in the dry season on forage and water intake, faecal output, eating time and weight changes of cattle in the Sahel. Treatments were factorial combinations of four levels of NG (0, 2, 4 an...


Ayantunde, Augustine A.Fernández Rivera, S.Hiernaux, Pierre H.Y.Keulen, H. vanUdo, H.M.J.Chanono, M.[Effect of nocturnal grazing and supplementation on diet selection, eating time, forage intake and weight changes of cattle]Effect of nocturnal grazing and supplementation on diet selection, eating time, forage intake and weight changes of cattle

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...


Rovere, R. LaHiernaux, Pierre H.Y.Keulen, H. vanSchiere, 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

Soils used for rainfed cereal production in Niger are sandy, deficient in major nutrients (N and P), and also low in organic matter content. Scarce rainfall with an unpredictable distribution in space and time makes crop and nutrient management difficult. Observations were made in 1996 and 1997...


Gandah, M.Bouma, JetskeBrouwer, J.Hiernaux, Pierre H.Y.Duivenbooden, N. van[Strategies to optimize allocation of limited nutrients to sandy soils of the Sahel: A case study from Niger, West Africa]Strategies to optimize allocation of limited nutrients to sandy soils of the Sahel: A case study from Niger, West Africa

Integrated natural resource management (INRM) is considered in the context of evolving crop-livestock systems in West Africa and recent Developments in approaches for INRM research. The major crop-livestock systems, ranging from extensive grazing, through integrated crop-livestock farming to inte...


Tarawali, Shirley A.Keatinge, J.D.H.Powell, J.M.Hiernaux, Pierre H.Y.Lyasse, O.Sanginga, Nteranya[Integrated natural resource management in West African crop-livestock systems]Integrated natural resource management in West African crop-livestock systems

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