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Using household survey data from a sample of 810 households, this paper analyses the determinants of children’s nutritional status and evaluates the impacts of improved maize varieties on child malnutrition in eastern Zambia. The paper uses an endogenous switching regression technique, combined w...


Manda, J.Gardebroek, C.Khonje, M.G.Alene, A.Mutenje, M.Kassie, M.[Determinants of child nutritional status in the eastern province of Zambia: the role of improved maize varieties]Determinants of child nutritional status in the eastern province of Zambia: the role of improved maize varieties

In the Cerrado region of Brazil conventional soybean monoculture is since the 1980s being replaced by direct seeding mulch-based cropping (DMC) with two crops per year and absence of tillage practices. The objective of this study was to assess the long-term impact of DMC on soil organic matter ac...


Maltas, ACorbeels, MarcScopel, EOliver, RDouzet, Jean-MarieSilva, F.A.M. daWery, J[Long-term effects of continuous direct seeding mulch-based cropping systems on soil nitrogen supply in the Cerrado region of Brazil]Long-term effects of continuous direct seeding mulch-based cropping systems on soil nitrogen supply in the Cerrado region of Brazil

The decline of soil organic matter (SOM) and its associated fertility is one of the most important constraints to enhanced crop productivity in sub-Saharan Africa. Integrated soil fertility management recognizes the potential benefits of the combined use of organic residue and mineral fertilizer ...


Gentile, RVanlauwe, BernardChivenge, P.P.Six, Johan[Trade-offs between the short and long term effects of residue quality on soil C and N dynamics]Trade-offs between the short and long term effects of residue quality on soil C and N dynamics

Soil organic matter (SOM) and phosphorus (P) fractions play a key role in sustaining the productivity of acid-savanna oxisols and are greatly influenced by tillage practices. In 1993, a long-term experiment on sustainable crop rotation and ley farming systems was initiated on a Colombian acid-sav...


Basamba, T.A.Barrios, E.Amézquita Collazos, EdgarRao, Idupulapati M.Singh, B.R.[Tillage effects on maize yield in a Colombian savanna oxisol : Soil organic matter and P fractions]Tillage effects on maize yield in a Colombian savanna oxisol : Soil organic matter and P fractions

Nutritionally enhanced beans (NEB) with more Fe and Zn than conventional beans (CB) and nutritionally enhanced maize (NEM) with more tryptophan and lysine than conventional maize (CM) were developed as part of a crop-biofortification strategy to improve human nutrition. Proxy measures were used t...


Pachón, HelenaOrtiz, D.A.Araújo, CBlair, Matthew W.Restrepo, J.[Iron, zinc, and protein bioavailability proxy measures of meals prepared with nutritionally enhanced beans and maize]Iron, zinc, and protein bioavailability proxy measures of meals prepared with nutritionally enhanced beans and maize

Los cruzamientos dialelos de 12 padres contrastantes en la toma y uso de fósforo se evaluaron en dos niveles de fósforo (4 y 15 ppm) usando un dise o experimental de alpha lattice con tres repeticiones. Se usó el dise o genético propuesto por Hallauer y Miranda. En bajo y alto fósforo se encontra...


Salazar Villareal, FANarro Leon, LAVallejo Cabrera, Franco Alirio[Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo = General and specific combining ability of efficient corn inbreeds to low phosphorus]Habilidad combinatoria general y específica de líneas endogámicas de maíz tolerantes a bajo fósforo = General and specific combining ability of efficient corn inbreeds to low phosphorus

Different fields within a farm have been observed to have different soil fertility status and this may affect the response of a maize crop to applied N, P, and K fertiliser. A limiting nutrient trial was carried out at six farms each, in three districts of Western Kenya. In each of the farms, the...


Vanlauwe, BernardTittonell, Pablo A.Mukulama, J[Within-farm soil fertility gradients affect response of maize to fertilizer application in Western Kenya]Within-farm soil fertility gradients affect response of maize to fertilizer application in Western Kenya

A comienzos de la década de los noventa en algunos cultivos de maíz y sorgo de la costa atlántica colombiana se registró la presencia de una enfermedad con características de mildeo velloso asociada a Peronosclerospora sorghi, adoptándose medidas tendientes a evitar su diseminación y establecimie...


Huertas, CASarria Villa, GAPineda López, Benjamín[Evidencias del mildeo velloso (Peronsclerospora sorghi (W. Weston & Uppal) C.G. Shaw) en cultivos de maíz y sorgo en Colombia]Evidencias del mildeo velloso (Peronsclerospora sorghi (W. Weston & Uppal) C.G. Shaw) en cultivos de maíz y sorgo en Colombia

La metodología presentada en este artículo permitió correlacionar el sellamiento del suelo y propiedades físicas como estabilidad estructural, velocidad de infiltración, suelo erosionado, escorrentía, resistencia normal y torsional, y distribución de agregados. Los resultados mostraron que los pa...


Galvis, JHAmézquita Collazos, EdgarMadero, E[Evaluación del efecto de la intensidad de labranza en la formación de costra superficial de un oxisol de sabana en los Llanos Orientales de Colombia : II. Caracterización física en superficie = Evaluation of harrowing intensity on surface crusting on an oxisol of the eastern plains of Colombia: II. Physical characterization in soil surface]Evaluación del efecto de la intensidad de labranza en la formación de costra superficial de un oxisol de sabana en los Llanos Orientales de Colombia : II. Caracterización física en superficie = Evaluation of harrowing intensity on surface crusting on an oxisol of the eastern plains of Colombia: II. Physical characterization in soil surface

The application of biochar (biomass-derived black carbon) to soil has been shown to improve crop yields, but the reasons for this are often not clearly demonstrated. Here, we studied the effect of a single application of 0, 8 and 20 t ha?1 of biochar to a Colombian savanna Oxisol for 4 years (200...


Major, JRondón, Marco AntonioMolina Lopez, DLRiha, SJLehmann, Johannes[Maize yield and nutrition during 4 years after biochar application to a Colombian savanna oxisol]Maize yield and nutrition during 4 years after biochar application to a Colombian savanna oxisol

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