Titles (114)Keywords (1)Abstracts (3)
A participatory evaluation of improved cowpea cultivars in the Guinea and Sudan savanna zones of north east Nigeria, Kamara, A., Ellis-Jones, J., Ekeleme, F.*, Omoigui, L., Amaza, P., Chikoye, D. and Dugje, I.*, in: Archives of Agronomy and Soil Science, volume 56, number 3, pages 355-370, ISSN 0365-0340, 2010. [DOI]
 
Acaulospora spinosissima, a new arbuscular mycorrhizal fungus from the Southern Guinea Savanna in Benin, Oehl, F., Tchabi, A.*, Silva, G. A., Sanchez-Castro, I., Palenzuela, J., Lawouin, L., do Monte Junior, I. P.*, Coyne, D. and Hountondji, F.*, in: Sydowia, volume 66, number 1, pages 29-42, ISSN 0082-0598, 2014. [DOI]
 
Africa research in sustainable intensification for the next generation: sustainable intensification of key farming systems in the Sudan and Guinea Savannas of west Africa, Hoeschle-Zeledon, I., 2019.
 
Agricultural transformation and fertilizer use in the cereal-based systems of the northern Guinea savanna, Manyong, V., Makinde, K. and Ogungbile, A., Wallingford, UK: CABI; International Institute of Tropical Agriculture (IITA), 2002.
 
Agronomic performance of maize cultivars representing three decades of breeding in the Guinea Savannas of West and Central Africa, Kamara, A., Menkir, A., Fakorede, M., Ajala, S., Badu-Apraku, B. and Kureh, I.*, in: Journal of Agricultural Science, volume 142, pages 567-575, ISSN 0021-8596, 2004. [DOI]
 
Agronomic Response of Soybean Varieties to Plant Population in the Guinea Savannas of Nigeria, Kamara, A., Ewansiha, S. U.*, Boahen, S. and Tofa, A., in: Agronomy Journal, volume 106, number 3, pages 1051-1059, ISSN 0002-1962, 2014. [DOI]
 
An investigation of factors that influence the technical efficiency of soybean production in the Guinea savannas of Nigeria, Amaza, P. and Ogundari, K., in: Journal of Food, Agriculture and Environment, volume 6, number 1, pages 132-136, ISSN 1459-0255, 2007.
 
Analyses of soil physico chemical properties determining Striga hermonthica infestations and grain yield of maize (Zea mays L.) in nigerian Guinea and Sudan savannas, Dugje, I.*, Kamara, A. and Kwari, J.*, in: Nigerian Journal of Weed Science, volume 21, pages 23-37, ISSN 0794-4950, 2008.
 
Arbuscular mycorrhizal fungi (AMF) respond to rhizobial inoculation and cropping systems in farmer's fields in the Guinea savanna, Sanginga, N., Carsky, R. and Dashiell, K., in: Biology and Fertility of Soils, volume 30, number 3, pages 179-186, ISSN 0178-2762, 1999.
 
Balanced nutrient management system technologies in the northern Guinea savanna of Nigeria: validation, adaptation, and perspective, Kolawole, G., Diels, J ., Manyong, V., Wallays, K., Dercon, G., Iwuafor, E.*, Falaki, A, Merckx, R . and Deckers, J., in: International Symposium of the African Network for Soil Biology and Fertility (AFNET) of TSBF Institute of CIAT, May 2004 at Yaounde, Cameroon, 2004.
 
Bergmann's rule holds in birds inhabiting southern Guinea forests but not in the northern Savanna of Nigeria, Barshep, Y.*, Awoyemi, A. G., Abalaka, J.* and Ottosson, U.*, in: Frontiers in Ecology and Evolution, volume 10, number -: 741755, pages 1-7, ISSN 2296-701X, 2022. [DOI]
 
Breeding cowpea for adaptation to intercropping for sustainable intensification in the Guinea Savannas of Nigeria, Omoigui, L., Kamara, A., Shaibu, A. S.*, Aliyu, K. T., Tofa, A., Solomon, R. and Olasan, O. J.*, in: Agronomy, volume 13, number 6: 1451, pages 1-12, ISSN 2073-4395, 2023. [DOI]
 
Cereal-legume rotation to control Striga and improve on-farm yield of maize in northern Guinea savanna: effects of one-year rotation, Kamara, A., Chikoye, D., Menkir, A., Kureh, I.*, Franke, L. and Ibikunle, O., in: Book of Abstracts of the 4th International Weed Science Congress, 20-25 June 2004, Durban, South Africa, 2004.
 
Chemical weed control in cowpea (Vigna unguiculata (L.) Walp.) in the subhumid and Guinea savanna zones of Nigeria, Poku, J. and Akobundu, I., in: Proceedings of the Second Biennial Conference of the West Weed Science Society, edited by M. Deat and P. Marnotte, pages 218-225, 1984.
 
Comparative evaluation of maize cultivars from IITA for their reaction to Striga hermonthica in southern and northern Guinea savanna agroecological zones of Nigeria, Emechebe, A., Menkir, A., Korie, S. and Badu-Apraku, B., in: Paper presented at: 6th Biennial Conference of the African Crop Science Society; 12-17 October, Nairobi, Kenya, 2003.
 
Compositional nutrient diagnosis (CND) and associated yield predictions in maize: a case study in the northern Guinea savanna of Nigeria, Shehu, B. M.*, Garba, I. I.*, Jibrin, J. M.*, Kamara, A., Adam, A. M.*, Craufurd, P., Aliyu, K. T., Rurinda, J.* and Merckx, R ., in: Soil Science Society of America Journal, volume 87, number 1, pages 63-81, ISSN 0361-5995, 2023. [DOI]
 
Crop–livestock integration along the gradient of resource-use intensification in the northern Guinea savanna of Nigeria, Ndubuisi, A., Zeddies, J., Manyong, V. and Smith, J., in: Quarterly Journal of International Agriculture, volume 37, pages 105-115, 1998.
 
Determinants of adoption and intensity of use of balance nutrient management systems technologies in the northern Guinea savanna of Nigeria, Akinola, A. A.*, Alene, A., Adeyemo, R.*, Sanogo, D., Olanrewaju, A., Nwoke, C. and Nziguheba, G., in: Quarterly Journal of International Agriculture, volume 49, number 1, pages 25-45, ISSN 0049-8599, 2010.
 
Determinants of manure use in crop production in northern guinea savanna zone of Nigeria, Adejobi, A. O.* and Kormawa, P., in: Proceedings, Witzenhausen, Germany, 2002.
 
Direct estimation of maize leaf area index as influenced by organic and inorganic fertilizer rates in Guinea Savanna, Berdjour, A., Dugje, I.*, Rahman, N. A., Odoom, D. A.*, Kamara, A. and Ajala, S., in: Journal of Agricultural Science, volume 12, number 6, pages 66-75, ISSN 1916-9752, 2020. [DOI]
 
Does nitrogen matter for legumes? Starter nitrogen effects on biological and economic benefits of cowpea (Vigna unguiculata L.) in Guinea and Sudan Savanna of west Africa, Rahman, N. A., Larbi, A., Kotu, B. H., Tetteh, F. M.* and Hoeschle-Zeledon, I., in: Agronomy, volume 8, number -:120, pages 1-12, ISSN 2073-4395, 2018. [DOI]
 
Dual purpose soybean lines for the Guinea savanna zone of Nigeria, Asafo-Adjei, B.*, Dashiell, K. and Sanginga, P., pages 64, 2001.
 
Economic analysis of crop-livestock integration in the northern Guinea savannah of Nigeria, Ndubuisi, A., Zeddies, J., Manyong, V. and Smith, J., in: Der Tropenland, Beitrage zur tropischen Landwirtschaft und Veterinarmedizin, volume 101, pages 69-83, 2000.
 
Economic assessment of cereal-legume rotations in the derived savanna and northern Guinea savanna agroecozones of Nigeria : Book of Abstracts, Oyewole, B., Schulz, S. and Tanko, R., pages 40, Margraf Verlag, 2001.
 
Effect of crop rotation and nitrogen fertilization on yield and nitrogen efficiency in maize in the northern Guinea savanna of Nigeria, Yusuf, A. A., Iwuafor, E.*, Abaidoo, R., Olufajo, O.* and Sanginga, N.+, in: African Journal of Agricultural Research, volume 4, number 10, pages 913-921, ISSN 1991-637X, 2009.
 
Effect of P fertilizer application on N balance of soybean crop in the guinea savanna of Nigena, Ogoke, I.*, Carsky, R., Togun, A.* and Dashiell, K.+, in: Agriculture, Ecosystems and Environment, volume 100, number 2-3, pages 153-159, ISSN 0167-8809, 2003.
 
Effect of planting pattern, crop variety and insecticide on the productivity of cowpea-cereal systems in Northern Guinea Savanna of Nigeria, Ajeigbe, H., Oseni, T. and Singh, B., in: Journal of Food, Agriculture and Environment, volume 4, number 1, pages 145-150, ISSN 1459-0255, 2006.
 
Effect of soybean on subsequent maize grain yield in the Guinea savanna zone of West Africa, Carsky, R., Abaidoo, R., Dashiell, K. and Sanginga, N., in: African Crop Science Journal, volume 5, number 1, pages 31-38, ISSN 1021-9730, 1997.
 
Effect of tillage, fertilizer and sorghum/desmodium intercrop cultivation on soils' quality and yield of sorghum in an alfisol of a Northern Guinea Savanna of Nigeria, Chidowe, O. A.*, Joshua, T. M.*, Sunday, A.*, Dawi, T. B.*, Oluoch, M. and Zeyaur, K.*, in: International Journal of Plant and Soil Science, volume 3, number 11, pages 1490-1503, ISSN 2320-7035, 2014.
 
Effects of commercial microbial inoculants and foliar fertilizers on soybean nodulation and yield in northern Guinea savannah of Nigeria, N'Cho, C.*, Yusuf, A. A.*, Ama-Abina, J.*, Jemo, M., Abaidoo, R. and Savane, I.*, in: International journal of Advance Agricultural Research, volume 1, pages 66-73, ISSN 2053-1265, 2013.
 
Effects of sole cropping, intercropping and rotation with legume trap-crops on striga control and maize grain yield in farmers' fields in the Guinea savannas, Kureh, I.* and Kamara, A., in: In demand-driven technologies for sustainable maize production in West and Central Africa, proceedings of the fifth biennial regional maize workshop, pages 169-179, International Institute of Tropical Agriculture (IITA); WECAMAN, Ibadan, Nigeria; Cotonou, Benin, 2007.
 
Evaluation of maize yield in an on-farm maize-soybean and maize-lablab crop rotation systems in the northern Guinea Savanna of Nigeria, Okogun, J., Sanginga, N. and Abaidoo, R., in: Pakistan Journal of Biological Sciences, volume 10, number 21, pages 3905-3909, ISSN 1028-8880, 2007.
 
Evaluation of multi-stress tolerant maize varieties for sustainable intensification in northern Guinea Savanna of north eastern Nigeria, Dugje, I., Odo, P. E.*, Teli, I. A.*, Kamara, A. and Asiedu, E. A.*, in: Maydica, volume 59, number 2, pages 136-143, ISSN 0025-6153, 2014.
 
Factors influencing risk aversion among maize farmers in the Northern Guinea Savanna of Nigeria: implications for sustainable crop development programmes, Olarinde, L.*, Manyong, V. and Akintola, J., in: Journal of Food, Agriculture and Environment, volume 8, number 1, pages 128-134, ISSN 1459-0255, 2010.
 
Factors responsible for variable growth of soybeans int he Nigerian Guinea savanna, Shannon, D. A., Kueneman, E. and Wright, M. J., Iowa State University, 1984.
 
Farmer-participatory on-farm evaluation of Striga hermonthica management options in the Nigerian northern Guinea savanna pilot site of the SP-IPM, Emechebe, A., James, B., Atala, T.*, Kureh, I.*, Hussaini, M. A.*, Singh, B., Menkir, A., Voh, J., Ado, S. and Alabi, S.*, in: Paper presented at: 6th Biennial Conference of the African Crop Science Society; 12-17 October, Nairobi, Kenya, 2003.
 
Farmers' agronomic and social evaluation of cowpea technologies in Guinea Savanna zones of Ghana: proceeding (poster), Adjei-Nsiah, S., Amppiah, S. A., Ampadu-Boakye, T., Kanampiu, F. and Giller, K., Pan African Grain Legumes and World Cowpea, 2016.
 
Fertility status of soils of the derived savanna and northern guinea savanna benchmarks and response to major plant nutrients, as influenced by soil type and land use management, Vanlauwe, B., Diels, J ., Lyasse, O., Aihou, K.*, Iwuafor, E.*, Sanginga, N., Merckx, R . and Deckers, J., in: Nutrient Cycling in Agroecosystems, volume 62, number 2, pages 139-150, ISSN 1385-1314, 2002.
 
Fertilizer use and definition of farmer domains for impact-oriented research in the northern Guinea savanna of Nigeria, Manyong, V., Makinde, K., Sanginga, N., Vanlauwe, B. and Diels, J ., in: Nutrient Cycling in Agroecosystems, volume 59, number 2, pages 129-141, ISSN 1385-1314, 2001. [DOI]
 
Gender and innovation in agriculture: a case study of farmers' varietal preference of drought tolerant maize in southern Guinea Savannah region of Nigeria, Ayinde, O. E.*, Abdoulaye, T., Olaoye, G.* and Akangbe,, J.*, in: Albanian Journal of Agricultural Sciences, volume 12, number 4, pages 617-625, ISSN 2218-2020, 2013.
 
Genotype x environment interactions of yield of cowpea (Vigna unguiculata (L.) Walp) inbred lines in the Guinea and Sudan Savanna ecologies of Ghana, Owusu, E.*, Amegbor, I. K.*, Mohammed, H.*, Kusi, F.*, Atopkle, I.*, Sie, E. K.*, Ishahku, M.*, Zakaria, M.*, Iddrisu, S.*, Kendey, H. A.*, Boukar, O., Fatokun, C. and Nutsugah, S. K.*, in: Journal of Crop Science and Biotechnology, pages 1-9, ISSN 1975-9479, 2020. [DOI]
 
Grain legume rotation benefits to maize in the northern Guinea savanna of Nigeria: fixed-nitrogen versus other rotation effects, Yusuf, A. A., Iwuafor, E.*, Abaidoo, R., Olufajo, O.* and Sanginga, N.+, in: Nutrient Cycling in Agroecosystems, volume 84, pages 129-139, ISSN 1385-1314, 2009.
 
Grain legumes for soil productivity improvement in the Northern Guinea savanna of Nigeria, Odunze, A.*, Tarawali, S., De Haan, N., Iwuafor, E.*, Katung, P. D.*, Akoueguon, G. E., Amadji, F.*, Schultze-Kraft, R., Atala, T.*, Ahmed, B.*, Adamu, A., Babalola, O.*, Ogunwole, J. O.*, Alimi, T., Ewansiha, S. U. and Adediran, S. A., in: Food, Agriculture and Environment, volume 2, number 2, pages 218-226, ISSN 1459-0255, 2004.
 
Grain yield response of maize to previous soybean crop and residue management in the Guinea savanna of Nigeria, Singh, A.*, Carsky, R., Lucas, E. O.* and Dashiell, K., pages 214-224, 2001.
 
Grain yields of rust resistant promiscuous soybean lines in the Guinea Savanna of Nigeria, Tefera, H., Bandyopadhyay, R. and Boukar, O., African Crop Science Society, 2009.
 
Grain yields of rust resistant promiscuous soybean lines in the Guinea savanna of Nigeria, Tefera, H., Bandyopadhyay, R., Adeleke, R., Boukar, O. and Ishaq, M.*, in: African Crop Science Conference Proceedings, 28 September - 2 October 2009, Southern Cape Sun Hotel, Cape Town, South Africa, pages 129-134, African Crop Science Society, 2009.
 
Impact of different planting date on shoot growth and tuber development of white Guinea yam grown in Guinea Savanna, Iseki, K., Olaleye, O. and Matsumoto, R., in: Plant Production Science, volume 27, number 3, pages 212-220, ISSN 1343-943X, 2024. [DOI]
 
Impacts of balanced nutrient management systems technologies in the northern Guinea savanna of Nigeria, Akinola, A. A.*, Alene, A., Adeyemo, R.*, Sanogo, D. and Olanrewaju, A., in: Journal of Food, Agriculture and Environment, volume 7, number 2, pages 496-504, ISSN 1459-0255, 2009.
 
Improved cowpea-cereal cropping systems: cereal-double cowpea system for the northern Guinea Savanna zone, Ajeigbe, H., Singh, B. B., Musa, A., Adeosun, J. O.*, Adamu, R. S.* and Chikoye, D., 2010.
 
Improvement in grain and fodder yields of early-maturing promiscuous soybean varieties in the Guinea savanna of Nigeria, Tefera, H., Kamara, A., Asafo-Adjei, B.* and Dashiell, K.+, in: Crop Science, volume 49, pages 2037-2042, ISSN 0011-183X, 2009.
 
Incorporating short-season legumes and green manure crops into maize-based systems in the moist Guinea savanna of West Africa, Franke, A., Schulz, S., Oyewole, B. and Bako, S., in: Experimental Agriculture, volume 40, pages 463-479, 2004.
 
Indigenous seed production and distribution strategies in Northern Guinea savannah Nigeria: opportunities for herbaceous legumes, Ajaero, J. O.*, Asiabaka, C. C.* and De Haan, N., in: Proceedings of the 42nd Annual Conference, Agricultural Society of Nigeria (ASN). October 19-23, 2008 Ebonyi State Unversity, Abakaliki, Nigeria, pages 374-379, 2008.
 
Influence of cereal-legume rotation on Striga control and maize grain yield in farmers' fields in the northern Guinea Savanna of Nigeria, Kureh, I.*, Kamara, A. and Tarfa, B.*, in: Journal of Agriculture and Rural Development in the Tropics and Subtropics, volume 107, number 1, pages 41-54, ISSN 1612-9830, 2006.
 
Influence of nitrogen fertilization on yield and yield components of rain-fed lowland NERIC rice in the northern Guinea savanna of Nigeria, Kamara, A., Ekeleme, F.*, Omoigui, L.* and Chikoye, D., in: African Journal of Agricultural Research, volume 6, number 13, pages 3092-3097, ISSN 1991-637X, 2011.
 
Influence of P sources and rhizobium inoculation on growth and yield of soybean genotypes on Ferric Lixisols of northern Guinea savanna zone of Ghana, Adjei-Nsiah, S., Kumah, J. F.*, Owusu-Bennoah, E.* and Kanampiu, F., in: Communications in Soil Science and Plant Analysis, pages 1-16, ISSN 0010-3624, 2019. [DOI]
 
Intensification of land use and the evolution of agricultural systems in the West African northern Guinea Savanna, Freeman, H. and Smith, J., in: Quarterly Journal of International Agriculture, volume 35, number 2, pages 109-124, 1996.
 
Legume-maize rotation or relay? Options for ecological intensification of smallholder farms in the Guinea Savanna of northern Ghana, Kermah, M., Franke, A. C.*, Ahiabor, B. D.*, Adjei-Nsiah, S., Abaidoo, R. and Giller, K., in: Experimental Agriculture, pages 673-691, ISSN 0014-4797, 2019. [DOI]
 
Maize hybrids response to high plant density in the Guinea savannah of Nigeria, Kamara, A., Menkir, A., Abubakar, A. W., Tofa, A., Ademulegun, T., Omoigui, L. and Kamai, N., in: Journal of Crop Improvement, pages 1-20, ISSN 1542-7528, 2020. [DOI]
 
Maize yield as affected by the interaction of fertilizer nitrogen and phosphorus in the Guinea savanna of Nigeria, Tofa, A., Kamara, A., Babaji, B. A.*, Aliyu, K. T., Ademulegun, T. and Bebeley, J. F., in: Heliyon, volume 8, number 11: e11587, pages 1-9, ISSN 2405-8440, 2022. [DOI]
 
Maize yield determinants in farmer-managed trials in the Nigerian northern Guinea savanna, Carsky, R., Nokoe, S., Lagoke, S.* and Kim, S. K.*, in: Experimental Agriculture, volume 34, number 4, pages 407-422, ISSN 0014-4797, 1998.
 
Maize yield following phosphorus-fertilized soybean in the Nigerian Guinea savanna, Ogoke, I.*, Carsky, R., Togun, A.* and Dashiell, K., pages 205-213, WECAMAN; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 2001.
 
Maize-grain legume intercropping for enhanced resource use efficiency and crop productivity in the Guinea savanna of northern Ghana, Kermah, M., Franke, A. C.*, Adjei-Nsiah, S., Ahiabor, B. D.*, Abaidoo, R. and Giller, K., in: Field Crops Research, volume 213, pages 38-50, ISSN 0378-4290, 2017. [DOI]
 
N2-fixation and N contribution by grain legumes under different soil fertility status and cropping systems in the Guinea savanna of northern Ghana, Kermah, M., Franke, A. C.*, Adjei-Nsiah, S., Ahiabor, B. D.*, Abaidoo, R. and Giller, K., in: Agriculture, Ecosystems and Environment, pages 1-10, ISSN 0167-8809, 2017. [DOI]
 
Nematodes as production constraints cereal-based cropping systems of the Northern Guinea Savanna: RCMP Research monograph, No. 17, Weber, G., Chindo, P. S.*, Elemo, K. A.* and Oikeh, S., RCMP Research monograph, No. 17, International Institute of Tropical Agriculture (IITA), 1995.
 
Nitrogen fixation and N contribution by promiscuous nodulating soybeans in the southern Guinea savanna of Nigeria, Sanginga, N., Dashiell, K., Okogun, J. and Thottappilly, G., in: Plant and Soil, volume 195, pages 257-266, ISSN 0032-079X, 1997.
 
Nodulation and estimation of symbiotic nitrogen fixation by herbaceous and shrub legumes in Guinea Savanna in Nigeria, Sanginga, N., Wirkam, L. E. and Okogun, J., in: Biology and Fertility of Soils, volume 23, pages 441-448, 1996.
 
Nutrient inputs for rehabilitation of non-responsive soils in the guinea and sudan savannah agroecological zones of Ghana: Impact on grain yield and soil quality, Asel, R.*, Abaidoo, R. C.*, Opoku, A.* and Adjei-Nsiah, S., in: Frontiers in Sustainable Food Systems, volume 6, number : 796878, pages 1-13, ISSN 2571-581X, 2022. [DOI]
 
On-farm evaluation of biological nitrogen fixation potential and grain yield of Lablab and two soybean varieties in the northern Guinea savanna of Nigeria, Okogun, J., Sanginga, P., Abaidoo, R., Dashiell, K. and Diels, J ., in: Nutrient Cycling in Agroecosystems, volume 73, number 2-3, pages 267-275, ISSN 1385-1314, 2005.
 
On-farm testing of Mucuna and cowpea double cropping with maize in the Guinea savanna of Nigeria, Oyewole, B. and Carsky, R., in: Cover crops for natural resource management in West Africa = Plantes de couverture et gestion des ressources naturelles en Afrique occidentale: proceedings of a workshop organized by IITA and CIEPCA, Cotonou, Benin, 26-29 October 1999. Ibadan, Nigeria, pages 138-147, 2000.
 
On-farm testing of Striga hermonthica control technologies in the northern Guinea savanna, Franke, A., Schulz, S., Hussaini, M. A.*, Ellis-Jones, J., Emechebe, A. and Chikoye, D., in: 8th International Parasitic Weeds Symposium, 24-25 June 2004; Durban, South Africa., 2004.
 
Participatory evaluation of improved cowpea cultivars in the Guinea and Sudan savanna zones of north east Nigeria, Kamara, A., Ellis-Jones, J., Ekeleme, F.*, Omoigui, L., Amaza, P., Chikoye, D. and Dugje, I.*, in: Archives of Agronomy and Soil Science, volume 56, number 3, pages 355-370, ISSN 1476-3567, 2010.
 
Participatory on-farm evaluation of improved legume cereals maize-double cowpea in Northern Guinea Savanna zone of Nigeria, Ajeigbe, H., Singh, B. B., Adeosun, J. O.* and Ezeaku, I., in: African Journal of Agricultural Research, volume 5, number 16, pages 2080-2088, ISSN 1991-637X, 2010.
 
Participatory on-farm evaluation of the performance of drought-tolerant maize varieties in the Guinea Savannas of Nigeria, Kamara, A., Kureh, I.*, Menkir, A., Kartung, P., Tarfa, B.* and Amaza, P., in: Journal of Food, Agriculture and Environment, volume 4, number 1, pages 192-196, ISSN 1459-0255, 2006.
 
Performance of diverse maize genotypes under nitrogen deficiency stress in the northern Guinea Savanna of Nigeria, Kamara, A., Menkir, A., Ajala, S. and Kureh, I.*, in: Experimental Agriculture, volume 41, number 2, pages 199-212, 2005.
 
Performance of dual purpose soybean lines for guinea savanna zone of Nigeria, Dashiell, K., Asafo-Adjei, B.* and Sanginga, P., in: Fifth Biennial Conference of the African Crop Science Society, 21-26 Oct, Lagos, Nigeria, 2001.
 
Performance of improved maize varieties under low and high N conditions in the Guinea savannas of Nigeria, Kamara, A., Kling, J., Sanginga, P. and Ajala, S., in: Deutscher Tropentang, 9-11 Oct. Bonn, Germany, pages 127, 2001.
 
Performance of old and new maize hybrids at high plant densities in the tropical Guinea Savanna, Kamara, A., Menkir, A., Kureh, I.*, Omoigui, L. and Ekeleme, F., in: Communications in Biometry and Crop Science, volume 1, number 1, pages 41-48, 2006.
 
Phosphorus recovery from triple superphosphate by soyabean in the Guinea savanna of Nigeria, Ogoke, I.*, Togun, A.*, Carsky, R. and Dashiell, K., in: Tropical Science, volume 46, number 3, pages 129-133, ISSN 0041-3291, 2006.
 
Phosphorus requirement and nodulation of herbaceous and shrub legumes in low P soils of a Guinean Savanna in Nigeria, Sanginga, N., Okogun, J., Akobundu, I. and Kang, B., in: Applied Soil Ecology, volume 3, number 3, pages 247-255, ISSN 0929-1393, 1996.
 
Physiological evaluation of soybean (Glycine max (L.) Merr.) varieties as influenced by inoculation and sowing date in the Guinea Savanna, Aminu, A. S.*, Ahmadu Bello University, 2019.
 
Pigeon pea (Cajanus cajan) fodder cutting management in the Guinea Savanna Agro-Ecological Zone of Ghana, Tenakwa, E. A.*, Imoro, A. Z.*, Ansah, T.* and Kizito, F., in: Agroforestry Systems, volume 96, pages 1-10, ISSN 0167-4366, 2022. [DOI]
 
Plant-available P for maize and cowpea in P-deficient soils from the Nigerian northern Guinea Savanna: comparison of E- and L-values, Pypers, P., Van Loon, L., Diels, J ., Abaidoo, R., Smolders, E. and Merckx, R ., in: Plant and Soil, volume 283, number 1-2, pages 251-264, 2006.
 
Potential effect of phytopesticide (rice husk extract) on root and soil-borne fungi pathogens of cowpea isolated in the Northern Guinea Savanna of Nigeria, Killani, A. S., Abaidoo, R. and Akintokun, A. K., Abstract (Oral presentation) in Program and Book of Abstracts of the 5th World Cowpea Research Conference, held at Palm Beach Hotel, Saly, Senegal. 27 September - 1 October, 2010.
 
Potential of drought-tolerant maize varieties in nitrogen-deficient soils of the Guinea savannas, Kamara, A., Menkir, A., Omoigui, L. and Kureh, I.*, in: In demand-driven technologies for sustainable maize production in West and Central Africa, proceedings of the fifth biennial regional maize workshop, pages 180-193, International Institute of Tropical Agriculture (IITA); WECAMAN, Ibadan, Nigeria; Cotonou, Benin, 2007.
 
Production efficiency of soybean farmers in the Guinea savannas of West Africa: empirical evidence from Nigeria: poster paper presented at the International Farm Manegement Association Congress held at University College Cork, Ireland, 15-20 July 2007, Amaza, P. and Ogundari, K., Poster, 2007.
 
Productivity of cowpea genotype under maize intercropping system in the northern and southern Guinea Savanna of Nigeria, Bukar, M. A.*, Bayero University,, 2020.
 
Progress in breeding for low nitrogen stress in the northern Guinea savanna, Alabi, S.*, Kling, J., Ado, S., Iyobisere, E., Ajala, S., Showemimo, F. and Tarfa, B.*, in: Abstracts opf the Fourth Biennial West and Central Africa Regional Maize Workshop, 14-18 May, pages 17, Cotonou, Benin Republic, 2001.
 
Reaction of cowpea varieties to Alectra vogeli in the northern Guinea Savanna of Nigeria, Magani, I. E.*, Lagoke, S.*, Emechebe, A., Singh, B. and Olufajo, O.*, number 6, 1996.
 
Reaction of cowpea varieties to Alectra Vogelii (Benth.) in Northern Guinea Savannah of Nigeria, Magani, I. E.*, Lagoke, S. T. O.* and Emechebe, A., in: The Nigerian Agricultural Journal, volume 40, number 1-2, pages 82-92, ISSN 0300-368X, 2009.
 
Residual benefits of promiscuous soybean to maize (Zea mays L.) grown on farmers' fields around Minna in the southern Guinea savanna zone of Nigeria, Osunde, A. O.*, Bala, A.*, Gwam, M.*, Tsado, P.*, Sanginga, N. and Okogun, J., in: Agriculture, Ecosystems and Environment, volume 100, number 2-3, pages 209-220, ISSN 0167-8809, 2003.
 
Residual benefits of soybeans genotypes and natural fallow to subsequent maize in the Northern Guinea Savanna of Nigeria, Yusuf, A. A.*, Iwuafor, E.*, Olufajo, O.*, Abaidoo, R. and Sanginga, N., in: In Demand driven technologies for sustainable maize production in West and Central Africa, pages 138-154, WECAMAN; International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 2007.
 
Response of early maturing maize to multiple-stresses in the Guinea savanna of west and central Africa, Badu-Apraku, B., Fakorede, M., Menkir, A., Kamara, A., Akanvou, L.* and Chabi, Y.*, in: Journal of Genetics and Breeding, volume 58, pages 119-130, ISSN 0394-9257, 2004.
 
Response of grain legumes to phosphorus application in the guinea savanna agro-ecological zones of Ghana, Adjei-Nsiah, S., Alabi, B. U., Ahiakpa, J. K.* and Kanampiu, F., in: Agronomy Journal, volume 110, number 2, pages 1-8, ISSN 0002-1962, 2018. [DOI]
 
Response of maize (Zea mays) to the application of foliar fertilizers in the Sudan and Guinea savanna zone of Nigeria, Jemo, M., Nwoke, C.*, Pypers, P. and Vanlauwe, B., in: Journal of Plant Nutrition and Soil Science, pages 1-10, ISSN 1436-8730, 2015. [DOI]
 
Response of N-use efficient and N-inefficient maize and traditional grain sorghum to nitrogen in the northern Guinea savanna of Nigeria, Oikeh, S., Carsky, R., Kling, J., Chude, V.* and Horst, W. J., pages 236-247, WECAMAN; International Institute of Tropical Agriculture (IITA), 2001.
 
Response of promiscuous soybean to rhizobial inoculation in combination with organic and mineral fertilizers in some soils of the Nigeria Guinea Savanna, Ekaette, J. E., Federal University of Technology, 2017.
 
Screening maize for drought tolerance in the Guinea savanna of West and Central Africa, Badu-Apraku, B., Fakorede, M., Menkir, A., Kamara, A. and Dapaah, S., in: Cereal Research Communications, volume 33, number 2-3, pages 533-540, 2005.
 
Smallholder farmers' constraints to maize growth and yield variability in the northern guinea savannah of Nigeria, Dakagan, J. B.*, Bayero University Kano, 2021.
 
Social impact of soybean in Nigeria's southern Guinea savanna, Sanginga, P., Adesina, A., Manyong, V., Otite, O.* and Dashiell, K., Impact series, International Institute of Tropical Agriculture (IITA), ISBN 978 131 168 1, 1999.
 
Soil fertility improvement in agroforestry after 30 years of silvopasture on ferric lixisols within the Guinea Savanna ecology of Nigeria, Mesele, S. A., Adelana, F. O. and Mechri, M.*, in: Trees, Forests and People, volume 20, number -: 100847, pages 1-9, ISSN 2666-7193, 2025. [DOI]
 
Soil N balance as affected by soybean maturity class in the Guinea savanna of Nigeria, Singh, A.*, Carsky, R., Lucas, E. O.* and Dashiell, K.+, in: Agriculture, Ecosystems and Environment, volume 100, number 2-3, pages 231-240, ISSN 0167-8809, 2003.
 
Soybean varietal response to plant population in the Guinea Savannas of Nigeria, Kamara, A., Ewansiha, S. U.* and Tofa, A., African Crop Science Society (ACSS), 2013.
 
Soybean yield determinants and response to rhizobial inoculation in an on-farm trial in the northern Guinea savanna of Nigeria, Okogun, J., Otuyemi, B. and Sanginga, P., in: West African Journal of Applied Ecology, volume 6, pages 30-39, 2004.
 
Striga hermonthica in cropping systems of the Northern Guinea Savanna: RCMP Research monograph, No. 19, Weber, G., Elemo, K. A.*, Award, A., Lagoke, S. T. O.* and Oikeh, S., RCMP Research monograph, No. 19, International Institute of Tropical Agriculture (IITA), 1995.
 
Sustainable intensification of cereal-based farming systems in Ghana's Guinea savanna: constraints and opportunities identified with local communities, Ellis-Jones, J., Larbi, A., Hoeschle-Zeledon, I., Dugje, I.*, Teli, I. A.*, Buah, S. S.*, Kanton, R.*, Kombiok, J. M.*, Kamara, A. and Gyamfi, I., 2012.
 
System dynamics and the defintion of research domains for the northern Guinea Savanna of West Africa, Weber, G., Smith, J. and Manyong, V., in: Agriculture, Ecosystems and Environment, volume 57, pages 133-148, 1996.
 
The role of technology in agricultural intensification: the evolution of maize production in the northern Guinea savanna of Nigeria, Smith, J., Barau, A. D., Goldman, A. and Mareck, J. H., in: Economic Development and Cultural Change, volume 42, number 3, pages 537-554, 1994.
 
The role of technology in agricultural intensification: the evolution of maize production in the northern Guinea savannah of Nigeria, Smith, J., Barau, A. D., Goldman, A. and Mareck, J. H., pages 144-166, CAB International, 1993.
 
Uses of indigenous tree species in selected area in the northern Guinea savanna of Nigeria, Hayashi, Y., Carsky, R. and Ladipo, D. O., in: Nigerian Journal of Forestry, volume 26, pages 14-20, 1998.
 
Utilization of rock phosphate by crops on a representative toposequence in the northern Guinea savanna zone of Nigeria: response by maize to previous herbaceous legume cropping and rock phospate treatments, Vanlauwe, B., Diels, J ., Sanginga, P., Carsky, R., Deckers, J. and Merckx, R ., in: Soil Biology and Biochemistry, volume 32, pages 2079-2090, 2000.
 
Utilization of rock phosphate by crops on a representative toposequence in the northern Guinea savanna zone of Nigeria: response by Mucuna pruriens, Lablab purpureus, and maize, Vanlauwe, B., Nwoke, C., Diels, J ., Sanginga, P., Carsky, R., Deckers, J. and Merckx, R ., in: Soil Biology and Biochemistry, volume 32, pages 2063-2077, 2000.
 
Vertical root-pulling resistance and its effects on lodging and grain yield of maize lines in the southern Guinea savanna of Nigeria, Kamara, A., Kling, J., Menkir, A. and Ibikunle, O., in: Maize revolution in West and Central Africa: proceedings of a Regional Maize Workshop, 14-18 May 2001. Ibadan, Nigeria, pages 252-261, International Institute of Tropical Agriculture (IITA), 2003.
 
Vertical root-pulling resistance and its effects on lodging and yield of 18 maize S1 lines in the southern Guinea savanna, Nigeria, Kamara, A. and Kling, J., pages 32, International Institute of Tropical Agriculture (IITA), Cotonou, Benin Republic, 2001.
 
Weeds in intensive cereal-based cropping systems of the Northern Guinea Savanna: RCMP Research monograph, No. 20, Weber, G., Elemo, K. A.* and Lagoke, S. T. O.*, RCMP Research monograph, No. 20, International Institute of Tropical Agriculture (IITA), 1995.
 
Phosphorus recovery from triple superphosphate by soyabean in the Guinea savanna of Nigeria, Ogoke, I.*, Togun, A.*, Carsky, R. and Dashiell, K., in: Tropical Science, volume 46, number 3, pages 129-133, ISSN 0041-3291, 2006.
 
Keywords:Phosphorus; Soyabean; Guinea savanna; Apparent fertilizer P recovery; Residual P

An investigation of factors that influence the technical efficiency of soybean production in the Guinea savannas of Nigeria, Amaza, P. and Ogundari, K., in: Journal of Food, Agriculture and Environment, volume 6, number 1, pages 132-136, ISSN 1459-0255, 2007.
 
Abstract:
The objective of this study was to examine the determinants of technical efficiency (TE) of soybean production in the Guinea savannas. A stochastic frontier production function, using maximum likelihood estimation (MLE) technique was applied in the analysis of data collected in 2006 from a sample of 182 soybean farmers in the guinea savannas of Borno State, Nigeria. The MLE results revealed that farm size, seeds, family labour, hired labour and fertilizer were the major factors that were associated with change in the output of soybeans and were significant (Ï=0.05). About 78% variations in the farmers output can be attributed to differences in their technical efficiency. The mean farmers TE index was found to be 0.79. The implication is that soybean production could be increased by approximately 21% through the improved use of available resources, given the current state of technology. Farmer-specific efficiency factors, which comprise age, gender and use of animal traction and market accessibility, were the significant factors that account for the observed variation in efficiency among the farmers. The policy implication of this finding is that providing farmers with effective market linkage, access to education, especially extension education and credit facilities to purchase animal traction will strengthen their present level of TE and the productivity potential of the soybean farmers in the study area.

Mycoflora and natural occurrence of aflatoxins and fumonisin B1 in cassava and yam chips from Benin, West Africa, Gnonlonfin, B.*, Hell, K., Fandohan, P.* and Siame, A. B.*, in: International Journal of Food Microbiology, volume 122, number 1-2, pages 140-147, 2008.
 
Abstract:
The presence of fungi, aflatoxins and fumonisin B1 in cassava and yam chips (during 28 processing and storage) were evaluated during two consecutive seasons in two agroecological zones of Benin (Northern Guinea Savannah, NGS and Sudan Savannah, SS). The Benin samples were assessed for moisture content, fungal infestation and total aflatoxin and fumonisin B1 contamination. During the two seasons, samples collected from the NGS, had moisture contents ranging from 10.0 to 14.7% in cassava chips and from 11.4 to 15.3% in yam chips. In samples from the SS, moisture content ranged from 10.1 to 14.5% and 11.1 to 14.5% in cassava and yam chips, respectively. A. flavus was the predominant fungal species. The maximum cfu/g in cassava and yam chips was 8950 and 6030, respectively. Other fungal species isolated included P. chrysogenum, M. piriformis, Phoma sorghina, F. verticillioides, R. oryzae and Nigrospora oryzae. High performance liquid chromatography analysis of both cassava and yam chips showed no contamination by either aflatoxins or fumonisin B1.

Soybean maturity and environmental effects in savanna systems; I: dry matter accumulation, Singh, A.*, Carsky, R., Lucas, E. O.* and Dashiell, K., in: Journal of Sustainable Agriculture, volume 20, number 1, pages 75-93, 2002.
 
Abstract:
Growing soybean varieties with high residue yield may help to sustain the soil organic matter (SOM) content when recycled. Replicated field trials were conducted in four Guinea savanna sites in Nigeria to study the dry matter partitioning in six soybean genotypes and evaluate them for biomass production. The varieties were early TGx1485-1D and late TGx1670-1F in Trial 1 and early TGx1485-1D, TGx1805-2E and TGx1681-3F, medium TGx1809-12E and late TGx923-2E and TGx1670-1F in Trial 2. On average, the proportion of total dry matter ac-cumulated in soybean plant parts was 42% in grain, 36% in stover, 12% in leaf litter and 11% in roots and nodules. While maturity class had no significant effect on the grain yield of soybean, significantly higher dry matter accumulation of roots and nodules, leaf litter, and stover was observed in medium and late varieties compared with early varieties (P < 0.05). Thus, medium and late varieties would be better able to sustain the SOM content than early varieties when the residues are recycled. Strongly acid soils in a high rainfall environment limited soybean biomass production and potential to maintain SOM.