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Canavalia brasiliensis (canavalia), a drought tolerant legume, was introduced into the smallholder traditional crop-livestock production system of the Nicaraguan hillsides as green manure to improve soil fertility or as forage during the dry season for improving milk production. Since nitrogen (N...


Douxchamps, SabineHumbert, FLHoek, Rein van derMena Urbina, Martin A.Bernasconi, SSchmidt, ARao, Idupulapati M.Frossard, EmmanuelOberson, Astrid[Nitrogen balances in farmers fields under alternative uses of a cover crop legume: a case study from Nicaragua]Nitrogen balances in farmers fields under alternative uses of a cover crop legume: a case study from Nicaragua

Decline in crop yields is a major problem facing smallholder farmers in Kenya and the entire Sub-Saharan region. This is attributed mainly to the mining of major nutrients due to continuous cropping without addition of adequate external nutrients. In most cases inorganic fertilizers are expensive...


Kimetu, J.M.Mugendi, DNPalm, C.A.Mutuo, PKGachengo, CNBationo, B. André[Nitrogen fertilizer equivalencies of organics of differing quality and optimum combination with organic nitrogen source in Central Kenya]Nitrogen fertilizer equivalencies of organics of differing quality and optimum combination with organic nitrogen source in Central Kenya

Leaves of nine green manure (GM) species were surface applied to a tropical volcanic-ash soil at a rate of 100 kg N ha 1 in order to evaluate their N-fertilizer value in a glasshouse experiment. GM treatments were compared to urea at two rates, 50 kg N ha 1 (FN50) and 100 kg N ha 1 (FN100), and t...


Cobo Borrero, Juan G.Barrios, E.Kass, DCLThomas, Richard J.[Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil]Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil
Pasuquin, J.M.Saenong, S.Tan, P.S.Witt, ChristianFisher, Myles J.[Evaluating N management strategies for hybrid maize in Southeast Asia]Evaluating N management strategies for hybrid maize in Southeast Asia

Nitrogen (N) fertilizers are a major input cost in rice production, and its excess application leads to major environmental pollution. Development of rice varieties with improved nitrogen use efficiency (NUE) is essential for sustainable agriculture. Here, we report the results of field evaluatio...


Selvaraj, Michael GomezValencia, Milton OrlandoOgawa, SatoshiLu, YingzhiWu, LiyingDowns, ChristopherSkinner, WayneLu, ZhongjinKridl, Jean C.Ishitani, ManabuBoxtel, Jos van[Development and field performance of nitrogen use efficient rice lines for Africa]Development and field performance of nitrogen use efficient rice lines for Africa

Traditionally, crop production in sub-Saharan Africa (SSA) depends primarily on mining soil nutrients. Integrated Soil Fertility Management (ISFM) is an approach for intensifying agriculture in SSA that aims at maximizing the agronomic efficiency (AE) of applied nutrient inputs. ISFM contains the...


Vanlauwe, BernardKihara, JobChivenge, P.P.Pypers, PieterCoe, R.Six, Johan[Agronomic use efficiency of N fertilizer in maize-based systems in sub-Saharan Africa within the context of integrated soil fertility management]Agronomic use efficiency of N fertilizer in maize-based systems in sub-Saharan Africa within the context of integrated soil fertility management

Major challenges for combined use of organic and mineral nutrient sources in smallholder agriculture include variable type and quality of the resources, their limited availability, timing of their relative application and the proportions at which the two should be combined. Short-term nutrient su...


Mtambanengwe, F.Mapfumo, PaulVanlauwe, Bernard[Comparative short-term effects of different quality organic resources on maize productivity under two different environments in Zimbabwe]Comparative short-term effects of different quality organic resources on maize productivity under two different environments in Zimbabwe

Aggregation and stabilization of soil organic C (SOC) and N are highly dependent on soil texture and addition of organic resources (ORs). While OR quality may influence SOC and N stabilization within aggregates, the simultaneous addition of N-fertilizers may enhance OR decomposition resulting in ...


Chivenge, P.P.Vanlauwe, BernardGentile, RSix, Johan[Comparison of organic versus mineral resource effects on short-term aggregate carbon and nitrogen dynamics in a sandy soil versus a fine textured soil]Comparison of organic versus mineral resource effects on short-term aggregate carbon and nitrogen dynamics in a sandy soil versus a fine textured soil

Background and Aims: The forage grass Brachiaria humidicola (Bh) has been shown to reduce soil microbial nitrification. However, it is not known if biological nitrification inhibition (BNI) also has an effect on nitrogen (N) cycling during cultivation of subsequent crops. Therefore, the objective...


Karwat, HannesMoreta, DaniloArango, JacoboNúñez, JonathanRao, Idupulapati M.Rincón, ÁlvaroRasche, FrankCadisch, Georg[Residual effect of BNI by Brachiaria humidicola pasture on nitrogen recovery and grain yield of subsequent maize]Residual effect of BNI by Brachiaria humidicola pasture on nitrogen recovery and grain yield of subsequent maize

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