Resultados de búsqueda - "Nigeria"

Cassava virus diseases in Africa por Legg, James P., Thresh, J.M.

Enlace del recurso

Introduction et diffusion du manioc en Afrique: Guide de recherche de lIita, No. 49 por Carter, S., Fresco, Louise O., Jones, P., Fairbairn, J.

Enlace del recurso

Evaluation multilocale de la resistance a la cercosporiose noire chez le bananier et le plantain por Gauhl, F., Pasberg-Gauhl, C., Vuylsteke, D.R., Ortíz, R.

Enlace del recurso

Conservation des ressources genetiques par le stockage des graines por Ng, N.Q.

Enlace del recurso

La securite en station de recherche agronomique: Guide de recherche de lIita, No. 44 por Austin, P.D.

Enlace del recurso

Le nonlabour dans les tropiques humides et subhumides dAfrique: Guide de recherche de lIita, No. 3 por Couper, D.C.

Enlace del recurso

Mulching effect of plant residues with chemically contrasting compositions on maize growth and nutrient accumulation por Tian, G., Kang, B., Brussaard, Lijbert

“…Effects of application of prunings of three woody species (Acioa barteri, Gliricidia sepium and Leucaena leucocephala), maize (Zea mays L.) stover and rice (Oryza sativa L.) straw as mulch on maize were studied on an Alfisol in southern Nigeria in 1990 and 1991. Maize dry matter and grain yield were higher with applications of plant residues and N fertilizer in both years. …”
Enlace del recurso

Spatial variability in soil chemical properties under Dactyladenia barteri, Alchomea cordifolia, Senna siamea, and Gmelina arborea hedgerows on an acid Ultisol por Ruhigwa, B., Gichuru, M., Tariah, N., Isirimah, N., Douglas, D.

“…Spatial nutrient distribution was studied under a three-and-a-half-year-old fallow of Dactyladenia barteri, Alchornea cordifolia, Senna siamea and Gmelina arborea hedgerows grown on an acid Ultisol in southeastern Nigeria. The objectives were to evaluate the nutrient cycling capacity and suitability of the hedgerow species for alley cropping. …”
Enlace del recurso

Effect of mound height and cassava cultivar on cassava performance under a fluctuating water table por Mohamoud, Y.

“…Field experiments were conducted at Ibadan and Bida in Nigeria, west Africa, to investigate the effect of mound height and cassava cultivar on cassava performance (tuber yield, top yield, tuber length, and plant height). …”
Enlace del recurso

Genetics of maize tolerance of Striga hemonthica por Kim, S.

“…A diallel cross involving 10 inbreds was tested under Striga infested fields at Mokwa, Nigeria, for 5 yr. Host plant response was rated on a scale of 1 (no symptoms) to 9 (plants dead or dying). …”
Enlace del recurso

Sweet potato root and biomass production with and without nitrogen fertilization por Hill, W., Dodo, H., Hahn, S., Mulongoy, K., Adeyeye, S.

“…In 1987 and 1988, improved sweet potato cultivars developed at International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria were grown with and without 50 kg N ha−1 in Oxic Paleustalfs with low N and C concentrations. …”
Enlace del recurso

Amelioration of a degraded Oxic Paleustalf by leguminous and natural fallows por Kang, B.T., Salako, F.K., Akobundu, I.O., Pleysier, J.L., Chianu, Jonas N.

“…The restorative ability of herbaceous (Psophocarpus palustris, Pueraria phaseoloides) and woody (Leucaena leucocephala, Senna siamea, Acacia leptocarpa, Acacia auriculiformis) legume species and of natural regrowth was studied on an eroded and compacted Oxic Paleustalf in southwestern Nigeria. Compared to the control treatment that was continuously cropped for 15 years, four years of fallowing significantly improved test crop yields. …”
Enlace del recurso

Studies on the reproductive biology of white yam (Dioscorea rotundata Poir.) por Segnou, M., Fatokun, C., Akoroda, M.O., Hahn, S.

“…Investigations were conducted on the identification and distribution of yam natural pollinators, flowering pattern and hybridization of white yam (Dioscorea rotundata Poir.) at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, in order to provide informations for producing hybrid seeds needed for vam genetic improvement. …”
Enlace del recurso

Investigation of inoculum threshold and latent infection in Colletotrichum gloeosporiodes f. sp. manihotis in cassava cultivars por Fokunang, C.N., Akem, C., Ikotun, T., Tembe-Fokunang, E.A., Koona, P., Dixon, A.

“…Studies were conducted at the advance pathology laboratory and glasshouse at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, to determine the inoculums threshold of fungal suspensions at different concentration levels, and also to investigate latent infection of cassava anthracnose disease pathogen, (colletotrichum gloeosporioides f. sp. …”
Enlace del recurso

The effect of weather regimes on the leaf area development and dry matter production in cassava por Akparobi, S., Ekanayake, I.J., Togun, A.

“…Twelve cassava (Manihot esculenta crantz) genotypes were grown at two field sites in Nigeria representing lowland and mid-altitude agroecological zones from 1994 to 1996 (Ibadan and Jos). …”
Enlace del recurso

Persistence of Mucuna pruriens biomass during the dry season along an agroecological transect in Benin por Carsky, R.J., Eteka, A.

Enlace del recurso

Analysis of phenotypic stability in ten cassava genotypes in three West African countries por Asante, K., Dixon, Alfred G.O.

“…Ten Cassava (Manihot esculenta, Crantz) genotypes were assessed for phenotypic fresh tuber yield stability for 2 years in nine locations in three West African countries (Nigeria, Ghana and Benin). From a combined analysis of variance for fresh yield, all main effects were significant. …”
Enlace del recurso

Incidence and control of root rot diseases of cashew seedlings, Anacardium occidentale in the nursery por Olunloyo, O.A.

“…Durante la estación lnviosa de 1973 se observó en dos almácigos adyacentes, en la Estación Experimental de Gambari, Cocoa Research Institute de Nigeria, Ibadán, una severa pudrición radical de plántulas de marañón, Anacardium occidentale L. …”
Enlace del recurso

Report of the Study on CGIAR Commitments in West Africa por CGIAR Study Panel on CGIAR Commitments in West Africa

“…Other recommendations concerned IFPRI policy research in Nigeria, the division of labor between ICRISAT and IITA and their NARS counterparts in West Africa, and the production impact of ICRISAT and WARDA research.In general the organization of CGIAR work was found to be reasonably efficient and cost-effective. …”
Enlace del recurso

Valeur ajoutée de la participation à l'analyse des risques des produits d'origine animale vendus dans le secteur informel por Bonfoh, Bassirou, Fokou, G., Traoré, S.G., Kouamé-Sina, S.M., Bechir, M., Zinsstag, Jakob, Grace, Delia, Dao, D.

“…Based on case studies in Sub-Saharan Africa in the informal sector of milk, meat and see food (Côte d'Ivoire, Ethiopia, Mali and Nigeria), we demonstrate that stakeholder participation and incorporation of their knowledge are likely to contribute to a more sophisticated risk analysis. …”
Enlace del recurso