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Establishing balanced nutrient requirements for maize (Zea mays L.) in the Northern Nigerian Savanna is paramount to develop site-specific fertilizer recommendations to increase maize yield, profits of farmers and avoid negative environmental impacts of fertilizer use. The model QUEFTS (QUantitat...


Shehu, B.M.Lawan, B.A.Jibrin, J.M.Kamara, A.Y.Mohammed, I.B.Rurinda, J.Zingore, S.Craufurd, P.Vanlauwe, BernardAdam, A.M.Merckx, R.[Balanced nutrient requirements for maize in the northern Nigerian savanna: parameterization and validation of QUEFTS model]Balanced nutrient requirements for maize in the northern Nigerian savanna: parameterization and validation of QUEFTS model

The pH dependent cation exchange capacity (CEC) and pH buffering capacity (pH BC) are two crucial properties in soil fertility management of variable charge soils. However, they are rarely measured, since most of the existing methods are cumbersome and time-consuming. We propose a new method, bas...


Oorts, K.Vanlauwe, BernardPleysier, J.L.Merckx, R.[A new method for the simultaneous measurement of Ph-dependent cation exchange capacity and ph buffering capacity]A new method for the simultaneous measurement of Ph-dependent cation exchange capacity and ph buffering capacity

The adaptability of cassava to low fertile and marginal soils facilitates its production in subsistent agriculture. As a result, smallholder farmers rarely apply fertilizers. The current yield gap is therefore very large, calling for application of fertilizers and soil amendments to improve its p...


Aliyu, I.A.Yusuf, A.A.Uyovbisere, E.O.Masso, C.Sanders, I.R.[Effect of co-application of phosphorus fertilizer and in vitro-produced mycorrhizal fungal inoculants on yield and leaf nutrient concentration of cassava]Effect of co-application of phosphorus fertilizer and in vitro-produced mycorrhizal fungal inoculants on yield and leaf nutrient concentration of cassava

Low concentrations of P and organic manure in savanna soils limit cowpea response to rhizobia. The study was conducted to determine the combined effect of P and organic manure on cowpea response to rhizobia in a factorial experiment arranged in randomized complete block design with three replicat...


Ulzen, J.Abaidoo, R.C.Ewusi-Mensah, N.Masso, C.[Combined application of inoculant, phosphorus and organic manure improves grain yield of cowpea]Combined application of inoculant, phosphorus and organic manure improves grain yield of cowpea

Cassava is an important staple food in subtropical regions; however, its production is adversely affected by cassava brown streak disease and poor soil fertility. Five improved and two local cassava varieties were evaluated for three seasons across two sites in Kizimbani, Zanzibar. Highly signifi...


Kanju, E.Uzokwe, V.N.E.Saleh, H.Mohamed, S.Masumba, E.Tumwegamire, SilverMtunda, K.[Performance of cassava brown streak disease-tolerant varieties in Zanzibar, Tanzania]Performance of cassava brown streak disease-tolerant varieties in Zanzibar, Tanzania

It is widely recognized that increasing agricultural production to the levels needed to feed an expanding world population requires sharply increased public investment in research and development and widespread adoption of new technologies, but funding for national and international agricultural ...


Alene, Arega D.Abdoulaye, TahirouRusike, JosephLabarta, Ricardo AntonioCreamer, BernardoRío, Martha, delCeballos, HernánBecerra López Lavelle, Luis Augusto[Identifying crop research priorities based on potential economic and poverty reduction impacts: The case of cassava in Africa, Asia, and Latin America]Identifying crop research priorities based on potential economic and poverty reduction impacts: The case of cassava in Africa, Asia, and Latin America

Soil organic matter (SOM) has a key role in maintaining soil fertility in weathered soils in the tropics. This study was conducted to determine the contribution of different SOM fractions to the cation exchange capacity (CEC) of a tropical soil as influenced by organic matter inputs of different ...


Oorts, K.Vanlauwe, BernardCofie, Olufunke O.Sanginga, N.P.Merckx, R.[Charge characteristics of soil organic matter fractions in a Ferric Lixisol under some multipurpose trees]Charge characteristics of soil organic matter fractions in a Ferric Lixisol under some multipurpose trees

This study reports and analyzes nutrient balances in experimental vegetable production systems of the two West African cities of Tamale (Ghana) and Ouagadougou (Burkina Faso) over a twoyear period comprising thirteen and eleven crops, respectively. Nutrient-use efficiency was also calculated. In ...


Akoto-Danso, Edmund K.Manka'abusi, D.Steiner, C.Werner, S.Haering, V.Lompo, D.J.-P.Nyarko, G.Marschner, B.Drechsel, PayBuerkert, Andreas[Nutrient flows and balances in intensively managed vegetable production of two West African cities]Nutrient flows and balances in intensively managed vegetable production of two West African cities

Integrated soil management with grain legumes was studied at two villages (Ugwan Shamaki) and Tashan Kaya) in Kaduna State, northern Guinea Savanna zone of Nigeria (190 day growing season). Impacts of one year rotation of Soybean and Cowpea on soil chemical properties were compared with sole maiz...


Tarfa, B.Kureh, I.Kamara, A.Maigida, D.[Influence of cereal legume rotation on soil chemical properties, crop yield and Striga control]Influence of cereal legume rotation on soil chemical properties, crop yield and Striga control

Poor water management and high nitrogen (N) losses are the key problems faced by rice farmers under rainfed inland valley systems. There is a need to evaluate different N fertilizers so as to identify one that could withstand these problems. The performance of polyolefin-coated urea (POCU) was th...


Oluwarotimi, O.Fashola, O.O.Hayashi, K.Wakatsuki, T.[Effect of water management and polyolefin-coated urea on growth and nitrogen uptake of indica rice]Effect of water management and polyolefin-coated urea on growth and nitrogen uptake of indica rice

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