Books and Book Chapters: Recent submissions

Now showing items 381-400 of 983

    • Agrophysiological constarints in intercropped cowpea: an analysis 

      Terao, T.; Watanabe, I.; Matsunaga, R.; Hakoyama, S.; Singh, B. (1997)
      Factors affecting cowpea growth in millet/cowpea intercropping were investigated in northern Nigeria. Ecological studies showed that cowpea received from < 30% to > 75% of incident light inside the intercropped canopy. In these light-limited conditions, cowpea varieties with a spreading growth habit can harvest more light than those with an erect growth habit by producing more leaves, as well as expanding their leaf area. However, the local spreading type has a low yield potential because of its ...

    • Viral diseases of cowpea and their control by resistance conferring genes 

      Hampton, R.; Thottappilly, G.; Rossel, H. (1997)
      Cowpea crops are susceptible low more than 20 viral diseases. Some of the most destructive viral pathogens are transmitted from one plant generation to the next through the seed, and thus are generally disseminated to most cowpea-producing regions of the world. Seedborne cowpea viruses, after establishment in plantings as seedborne inoculum, are typically spread within fields by insect vectors (either aphid or beetle species). The most effective control of cowpea viral diseases, universally, has ...

    • Adoption and impact of dryseason dualpurpose cowpea in the semiarid zone of Nigeria 

      Inaizumi, H.; Singh, B.; Sanginga, P.; Manyong, Victor M.; Adesina, A.A.; Tarawali, Shirley A. (1999)
      In the semiarid region of West and Central Africa, farmers traditionally cultivate different cowpea varieties for grain and fodder. However, the grain yield potential and the availability of good quality fodder is limited by several factors: insects, pests and diseases, low and erratic rainfall, and the long dry season. In the early 1990s, the International Institute of Tropical Agriculture (IITA), in collaboration with the International Livestock Research Institute (ILRI), initiated a breeding ...

    • Mucuna-herbaceous cover legume with potential for multiple uses 

      Carsky, R.; Tarawali, G.; Becker, M.; Chikoye, D.; Tian, G.; Sanginga, N. (1998)

    • Les maladies virales du niebe en Afrique: Guide de recherche de lIita, No. 53 

      Thottappilly, G.; Rossel, H. (1998)
      Huit virus ont ete signrues sur Ie niebe en Afrique. Les virus du niebe sont decrits pour les basses terres hum ides et subhumides de I'Afrique occidentale ainsi que pour les wnes ecologiques d'rutitude moyenne en Mrique orientale et australe. Chaque fois que les installations sont limitees et que la caracterisation detaillee s'avere difficile, une simple procedure utilisant une combinaison de tests serologiq ues (test de diffusion par gel d'agar), l'inoculation et les etudes de transmission par ...

    • Les engrais; definitions et calculs: guide de recherche de lIita, No. 24 

      Kang, B. (1997)
      Les engrais fournissent les elements nutritifs necessaires aux vegetaux pour leur developpement, D'une maniere general, les vegetaux absorbent les elements nutritifs dissous dans I'eau. Toutefois, on ne peut pas se servir uniquement de la solubilite dans l'eau pour mesurer la quantite d'elements nutritifs disponibles aux vegetaux. II existe plusieurs defmitions et termes d'importance pour decrire les engrais. Le "dosage" d'un engrais, par exemple, decrit sa teneur en NP205-K20 en pourcentage du ...

    • Analyse sexospecifique dans la production agricole: Guide de recherche de lIita, No. 58 

      Buckland, L.; Haleegoah, J. (1998)
      La ‘sexospecificite' est un concept utilize en sciences socials pour etudier les roles et les activites des homes et des femmes. Ces roles sont souvent socialement defines, et faconnes par les traditions et les croyances d'une culture donnee. Bien que les femmes contribuent entre 60 et 80% de la productionagricole dans les pays en developpement, les agricultrices ont moins de chance de beneficier des services d'encadrement et des technologies qui pourraient ameliorer leur production. Par consequent, ...

    • Amelioration de la duree de conservation du plantain et de la banane: Guide de recherche de lIita, No. 62 

      Ferris, R.S.B. (1998)
      Le plantain et la banana sont des cultures vivrieres importantes dans la zone humide d' Afrique sub-saharienne. Le plantain et la banana ont le granddesavantage d'avoir des fruits tres perissables. Par consequent, les cherchurs tentent de trouver les voies et moyens d'en prolonger la duree de conservation. On peur utiliser plusieurs methods pour prolonger la duree de conservation. Les fonctionsphysiologiques les plus importantes affectant la qualite du produit pendant la conservation sont la ...

    • Cassava production in Ghana: a function of market demand and farmer access to improved production and processing technologies 

      Nweke, F.; Haleegoah, J.; Dixon, A.; Ajobo, O.; Ugwu, B.; Al-Hassan, R. (1999)

    • Morphology of cassava: IITA research guide, No. 61 

      Ekanayake, I.; Osiru, D.; Porto, M. (1997)

    • Agronomy of cassava: IITA research guide, No. 60 

      Ekanayake, I.J.; Osiru, D.; Porto, M. (1997)
      Even though cassava is a durable crop, it has certain husbandry requirements and is responsive to favorable crop management practices. Healthy, fresh stem cuttings from mature cassava plants are the best planting materials. Depending on moisture conditions of the soil, farmers plant cassava cuttings vertically, at an angle, or horizontally. Slow initial development of sprouts makes cassava susceptible to weed competition in the first 3-4 months. Therefore, weed control involves cultural, biological, ...

    • Cassava production in Nigeria: a function of farmer access to markets and to improved production and processing technologies 

      Nweke, F.; Ugwu, B.; Dixon, A.; Asadu, C.; Ajobo, O. (1999)

    • Production prospects for cassava in Uganda 

      Nweke, F.; Otim-Nape, W.; Dixon, A.; Asadu, C.; Baguma, Yona K.; Ajobo, O.; Ugwu, B.; Bua, A.; Masembe-Kajubi, H. (1999)

    • Gender surprises in food production, processing, and marketing with emphasis on cassava in Africa 

      Nweke, F.; Enete, A. (1999)

    • IITA resource and crop management technologies a synopsis 

      Oikeh, S. (1999)

    • Onfarm yield loss assessment of black sigatoka on plantain and banana 

      Gauhl, F.; Ferris, S.; Pasberg-Gauhl, C.; Lawrence, A. (1998)

    • Les virus et les maladies virales du mais en Afrique tropicale 

      Thottappilly, G.; Rossel, H.W.; Bosque-Pérez, N.A. (1998)
      Sept virus ont etil signales sur Ie ma'is en Afrique tropicale; toutefois, peu d'informations sont dis• ponibles sur ces virus. Le virus de La striure du mals est tres repandu en Afrique subsaharienne; d'autres virus Ie sont moins ou sont d'importance locale seulement. Des informations sur Les virus et les maladies virales pour• raient aider les selectionneurs it etablir leurs priorites, La selection pour la resistance est la solution la plus pratique au probleme de virus.

    • Insect pests of maize in storage: biology and control 

      Kossou, D.K.; Bosque-Pérez, N.A. (1998)
      Damage and losses to stored maize in Africa are often severe. Storage pests of an area have to be identified to determine whether they merit control and to choose appropriate control methods. Know ledge of the biology of pests and of factors influencing preharvest and postharvest infeststion is important to control insect pests in maize storage.

    • Soils of arable crop fields in sub-Saharan Africa: focus on cassavagrowing areas 

      Asadu, C.; Nweke, F. (1999)

    • Integrated assessment of crop–livestock production systems beyond biophysical methods: role of systems simulation models 

      Masikati, P.; Homann-Kee Tui, Sabine; Descheemaeker, Katrien; Sisito, G.; Senda, T.; Crespo, O.; Nhamo, N. (Elsevier, 2018)
      Crop–livestock farming systems that are predominant in Africa, are complex with various interrelated ecological and economic factors. They involve multiple products or benefits (intended and nonintended), with trade-offs and synergies occurring both on- and off-site and varying over time. Understanding both simplistic relationships and complex interactions between climate and agricultural production systems to determine overall system efficiency and impacts on human well-being is a major challenge. ...