System dynamics and the definition of research domains for the northern Guinea savanna of West Africa

Weber, G.; Smith, Joyotee; Manyong, M. V.

doi:10.1016/0167-8809(96)01025-0

Cited by 19 publications

(9 citation statements)

References 19 publications

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“…From the information gained from farmers in the impact workshops, and other studies of similar crop livestock farming systems (Ehui et al, 1998; Inaizumi et al, 1999; Okike et al, 2001; Weber et al, 1996; Williams et al, 1999), the following stratification criteria were chosen for village‐level, followed by household‐level, surveys: human population density and access to a wholesale market (for obtaining farm inputs and for sale of produce). Based on these variables, four socioeconomic domains were defined (Manyong et al, 1996; Okike, 1999):…”

Section: Methodsmentioning

confidence: 99%

Farmers' perceptions of benefits and factors affecting the adoption of improved dual‐purpose cowpea in the dry savannas of Nigeria

Kristjanson

Okike

Tarawali³

et al. 2005

Agricultural Economics

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This study links participatory research methods, geographic information systems (GIS) techniques, village and householdlevel surveys, and a tobit analysis to examine the adoption and impact issues related to a new technology, improved varieties of dual-purpose cowpea (IDPC), developed by International Institute of Tropical Agriculture (IITA) and International Livestock Research Institute (ILRI) and recently released in Nigeria. The article analyzes factors affecting the adoption and impact of the technology across different socioeconomic domains as defined by degree of market access and population density. The results show multiple benefits from this flexible leguminous crop, many of which relate to the fodder and soil fertility-enhancing aspects of IDPC rather than higher grain yields per se. The intensity of adoption was affected by different village-and household-level factors in each socioeconomic domain, allowing more sharply defined recommendation domain-targeting strategies. The multiple research approaches taken also provided useful lessons at different system levels regarding the benefits of, and perceived problems with, this technology for researchers, development practitioners, and policy makers. The collaborative research approaches taken in this study are helping to close the "feedback loop" from farmers back to researchers and others attempting to disseminate the technology, and by doing so, should contribute to faster and more widespread uptake of this technology.

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Section: Methodsmentioning

confidence: 99%

Farmers' perceptions of benefits and factors affecting the adoption of improved dual‐purpose cowpea in the dry savannas of Nigeria

Kristjanson

Okike

Tarawali³

et al. 2005

Agricultural Economics

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“…6 kg N per 100 kg of grain produced if aboveground residues are removed (Cretenet et al 1994). Thus the soils must supply about 50-60 kg N (usually nitrate)/ha in plant available forms for each tonne of grain produced (Weber et al 1996). In the West African savannah, where maize is becoming increasingly important, inorganic fertilizer use is limited due to high cost and non-availability.…”

Section: Introductionmentioning

confidence: 99%

Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population

et al. 2003

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Eighteen S1 lines of maize (Zea mays L.) derived from a low nitrogen tolerant pool and two inbred lines were evaluated for agronomic performance under moderate N conditions in the southern Guinea savannah of Nigeria. Generally, the breeding lines differed in yield, growth, vertical root-pulling resistance, N-uptake and N-use efficiency. Breeding lines with high vertical root-pulling resistance took up more N and utilized it more efficiently. They also showed better agronomic performance and recorded higher yields. Principal component and cluster analyses classified the breeding lines into six groups. The results of principal components analyses (PCA) suggest that the most important variables for the classification of the S1 lines were grain yield, plant height, total dry matter during the grain-filling period and at maturity, N-accumulation, N-uptake and N-use efficiency. Other important traits were days to silking, anthesis-silking interval, ears per plant, harvest index and vertical root-pulling resistance. Two groups containing a total of 14 S1 lines that had higher agronomic performance than others are recommended for further evaluation under severe N stress to ascertain their tolerance of low N stress before recombination to form a new population for the next cycle of selection.

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“…In the West Africa savanna, the intensification of agricultural systems has resulted in declining nutrient availability, soil 710 acidification, compaction and build-up of pest problems seriously affecting soil productivity and affecting soil fertility and the overall yield of crops (Webber et al, 1996). Recently there has been a renewed effort to address these problems through the introduction of legumes into the production systems (COMBS, 1993).…”

Section: Introductionmentioning

confidence: 99%

Evaluating Yield Performance of Cowpea Varieties under Sole And Intercropping with Sorghum at Bauchi, Nigeria

Ibrahim¹,

Singh²,

Babaji³

2014

Ethiop. J. Env Stud & Manag

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System dynamics and the definition of research domains for the northern Guinea savanna of West Africa

Cited by 19 publications

References 19 publications

Farmers' perceptions of benefits and factors affecting the adoption of improved dual‐purpose cowpea in the dry savannas of Nigeria

Farmers' perceptions of benefits and factors affecting the adoption of improved dual‐purpose cowpea in the dry savannas of Nigeria

Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population

Evaluating Yield Performance of Cowpea Varieties under Sole And Intercropping with Sorghum at Bauchi, Nigeria

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