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Nitrogen is the nutrient with greatest influence on yield and cost production of rice; it is then necesary to look for its most efficient use. Three field experiment were carried out to determine the agornomic efficiency of four urea forms (prilled, forestry grade, supergranules and sulfur-coated...


Arregocés, Oscar[Evaluación de la eficiencia agronómica de cuatro formas de urea en el cultivo del arroz]Evaluación de la eficiencia agronómica de cuatro formas de urea en el cultivo del arroz
Japan International Research Center for Agricultural SciencesJapan International Research Center for Agricultural SciencesInternational Center for Tropical Agriculture[Exploiting biological nitrification inhibition in agriculture]Exploiting biological nitrification inhibition in agriculture
Aníbal, VW[Aspectos de la economía de producción y comercialización del arroz en América Latina]Aspectos de la economía de producción y comercialización del arroz en América Latina
León Sarmiento, Luis AlfredoArregocés, Oscar[Factores que afectan la respuesta a la fertilización nitrogenada del arroz]Factores que afectan la respuesta a la fertilización nitrogenada del arroz
Arregocés, OscarLeón Sarmiento, L.A.[Guía de estudio para ser usada como complemento de la unidad audiotutorial sobre el mismo tema][Fertilización nitrogenada de arroz]Fertilización nitrogenada de arroz

Two crop rotation cycles were evaluated to determine the effect of cropping systems and N fertilization on the yield and efficiency of N in maize. Maize was grown on plots which had previously supported monocrops of two genotypes each of soybean (TGx 1448-2E and SAMSOY-2) and cowpea (IT 96D-724 a...


Yusuf, A.A.Iwuafor, E.N.O.Abaidoo, R.C.Olufajo, O.O.Sanginga, Nteranya[Effect of crop rotation and nitrogen fertilization on yield and nitrogen efficiency in maize in the northern Guinea savanna of Nigeria]Effect of crop rotation and nitrogen fertilization on yield and nitrogen efficiency in maize in the northern Guinea savanna of Nigeria

Inadequate nitrogen nutrition is a major constraint to the performance of common bean (Phaseolus vulgaris L.) in sub-Saharan Africa. Twenty six lines selected for good performance under N-limiting conditions were further evaluated at two locations in Uganda to determine the mechanisms allowing go...


Wortmann, Charles S.Silver-Rwakaikara, MLynch, J[Efficiency of nitrogen acquisition and utilisation in common bean in Uganda]Efficiency of nitrogen acquisition and utilisation in common bean in Uganda

Maize (Zea mays L.) and bean (Phaseolus vulgaris L.) are commonly grown in association in eastern and southern Africa. Results from 64-fertilizer response trials conducted in Kenya were used to study the relationship between maize monoculture response to fertilizer nitrogen and phosphorus and the...


Wortmann, Charles S.Schnier, HFMuriuki, AW[Estimation of the fertilizer response of maize and bean intercropping using sole crop response equations]Estimation of the fertilizer response of maize and bean intercropping using sole crop response equations
Yusuf, A.A.Iwuafor, E.N.O.Abaidoo, R.C.Olufajo, O.O.Sanginga, Nteranya[Grain legume rotation benefits to maize in the northern Guinea savanna of Nigeria : Fixed-nitrogen versus other rotation effects]Grain legume rotation benefits to maize in the northern Guinea savanna of Nigeria : Fixed-nitrogen versus other rotation effects

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