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Improved cropping systems with in-situ production of organic matter require the input of additional inorganic N to maintain crop production in a sustainable way. For proper management of this fertilizer-N, it is necessary to quantify how the applied fertilizer N is used by the various components ...


Vanlauwe, BernardSanginga, N.Merckx, R.[Alley cropping with Senna siamea in southwestern Nigeria: 1 Recovery of 15N labelled urea by the alley cropping system]Alley cropping with Senna siamea in southwestern Nigeria: 1 Recovery of 15N labelled urea by the alley cropping system

Crop and tree roots are crucial in the nutrient recycling hypotheses related to alley cropping systems. At the same time, they are the least understood components of these systems. The biomass, total N content and urea-derived N content of the Senna and maize roots in a Senna-maize alley cropping...


Vanlauwe, BernardSanginga, N.Merckx, R.[Alley cropping with Senna siamea in southwestern Nigeria: 11 Dry matter, total N, and ureaderived N dynamics of the Senna and maize roots]Alley cropping with Senna siamea in southwestern Nigeria: 11 Dry matter, total N, and ureaderived N dynamics of the Senna and maize roots

Differences in growth, nodulation and arbuscular mycorrhizal fungi (AMF) root infection among recent cowpea breeding lines from IITA were examined at low and high P levels in pot (94 lines) and field experiments (43 lines) at Fashola in the derived savanna zone of Nigeria. Based on their growth p...


Sanginga, N.Lyasse, O.Singh, B.[Phosphorus use efficiency and nitrogen balance of cowpea breeding lines in a low P soil of the derived savanna zone in West Africa]Phosphorus use efficiency and nitrogen balance of cowpea breeding lines in a low P soil of the derived savanna zone in West Africa

Agronomic results indicate that maize grain yields generally are higher when the crop is planted following soybean than in continuous maize cultivation in the moist savanna agroecological zones of West Africa. Many factors have been hypothesized to explain this phenomenon, including enhanced N av...


Sanginga, N.Okogun, J.Vanlauwe, BernardDashiell, Kenton E.[The contribution of nitrogen by promiscuous soybeans to maize based cropping the moist savanna of Nigeria]The contribution of nitrogen by promiscuous soybeans to maize based cropping the moist savanna of Nigeria

Although the West-African moist savanna zone has a high potential for crop production, yields on farmers' fields are, on average, far below this potential, mainly due to the low use of external sources of nutrients. Since the mid-1990s, it has become clear that in order to upgrade crop production...


Vanlauwe, BernardAihou, K.Houngnandan, P.Diels, J.Sanginga, N.Merckx, R.[Nitrogen management in adequate input maizebased agriculture in the derived savanna benchmark zone of Benin Republic]Nitrogen management in adequate input maizebased agriculture in the derived savanna benchmark zone of Benin Republic

One of the options to alleviate soil fertility constraints for sustainable agriculture in the savannas of West Africa is to develop soil nutrient management technologies from an adequate supply and feasible share of organic and mineral inputs. This paper makes a diagnosis of farm-level use of org...


Manyong, Victor M.Makinde, K.Sanginga, N.Vanlauwe, BernardDiels, J.[Fertilizer use and definition of farmer domains for impactoriented research in the northern Guinea savanna of Nigeria]Fertilizer use and definition of farmer domains for impactoriented research in the northern Guinea savanna of Nigeria

The suitability of sesbania (Sesbania rostrata) as green manure for lowland rice was evaluated in the Inland Valley Swamp (IVS) of Sierra Leone, and attempts were made to identify appropriate methods of its management in combination with urea. Sesbania — rice intercropping and sesbania — rice rot...


Bar, A.R.Baggie, I.Sanginga, N.[The use of Sesbania (Sesbania rostrata) and urea in lowland rice production in Sierra Leone]The use of Sesbania (Sesbania rostrata) and urea in lowland rice production in Sierra Leone

Result of long time alley cropping trials show that the inclusion of N2- fixing hedgerow species maintain higher levels of soil fertility than control treatment (no hedgerow) on high base status soils in the humid zone. Hedgerows contribute to nutrient cycling and higher faunal activity. With goo...


Kang, B.Hauser, S.Vanlauwe, BernardSanginga, N.Atta-Krah, A.N.[Alley farming research on high base status soils]Alley farming research on high base status soils

To date, the site-specific, mixed reports of the influence of hedgerows on crap yields provide little predictive insight into which type of tree/crop combination is most appropriate for a specific location. The Alley Farming Network for Tropical Africa was established in 1989. The objectives of t...


Woomer, P.L.Bajah, O.Atta-Krah, A.N.Sanginga, N.[Analysis and interpretation of alley farming network data from tropical Africa]Analysis and interpretation of alley farming network data from tropical Africa

In cropping systems with limited amounts of external inputs, the soil organic matter pool (SOM) may contribute significantly to plant nutrition. The impact of organic inputs on total SOM and particulate organic matter (POM) N contents as affected by soil type and the relationships between sources...


Vanlauwe, BernardAman, S.Aihou, K.Tossah, B.K.Adebiyi, V.Sanginga, N.Lyasse, O.Diels, J.Merckx, R.[Alley cropping in the moist savanna of West Africa III. Soil organic matter fractionation and soil productivity]Alley cropping in the moist savanna of West Africa III. Soil organic matter fractionation and soil productivity

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