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Se estudió el cambio en el contenido nutricional de los tallos de yuca ocasionado por diferentes niveles de fertilización al suelo y el efecto de las estacas obtenidas de esos tallos sobre el cultivo subsiguiente. Los 9 niveles nutricionales del suelo incidieron en la altura y vigor de las planta...


López Molina, J.El-Sharkawy, Mabrouk A.López, Y.[Fertilidad del suelo y calidad nutricional de estacas de yuca (Manihot esculenta Crantz)]Fertilidad del suelo y calidad nutricional de estacas de yuca (Manihot esculenta Crantz)

To develop an effective breeding programme for rainfed production of the common bean (Phaseolus vulgaris L.), the inheritance of seed yield under such conditions should be understood, preferably considering the effects of environment to account for site or season specificity. Thus, heritability, ...


White, Jeffrey W.Ochoa Marquez, RIbarra Perez, FJSingh, Shree P.[Inheritance of seed yield, maturity and seed weight of common bean (Phaseolus vulgaris) under semi-arid rainfed conditions]Inheritance of seed yield, maturity and seed weight of common bean (Phaseolus vulgaris) under semi-arid rainfed conditions

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

To guide soil fertility investment programmes in sub-Saharan Africa, better understanding is needed of the relative importance of soil and crop management factors in determining smallholder crop yields and yield variability. Spatial variability in crop yields within farms is strongly influenced b...


Tittonell, Pablo A.Shepherd, Keith D.Vanlauwe, BernardGiller, Ken E.[Unravelling the effects of soil and crop management on maize productivity in smallholder agricultural systems of western Kenya : An application of classification and regression tree analysis]Unravelling the effects of soil and crop management on maize productivity in smallholder agricultural systems of western Kenya : An application of classification and regression tree analysis

Four inoculated ecotypes of each of Centrosema acutifolium, C. brasilianum and C. macrocarpum were grown in undisturbed soil (oxisol) cores in a glasshouse to study their response to 7 phosporus levels (a total of 11, 22, 45, 90, 180, 360 and 720 mg/core P, surface applied as Ca(H2PO4)2.H2O). Sev...


Cadisch, GeorgSylvester-Bradley, RosemaryNosberger, J[Variation in growth and N2 fixation within and among Centrosema spp. in response to phosphorus supply]Variation in growth and N2 fixation within and among Centrosema spp. in response to phosphorus supply

En la zona central cafetera de Colombia, en un suelo Pachic Melanudands medial isotérmico, se midió la actividad de arilsulfatasa en rizosfera de plátano Musa AAB, en tres sistemas de manejo agronómico (químico o convencional, tradicional y ecológico), cuatro profundidades (0-5, 5-10, 10-20 y 20-...


Bolaños Benavides, Martha M.Sánchez de Prager, MarinaRao, Idupulapati M.[Arilsulfatasa en la rizosfera de plátano, Musa AAB y relación con crecimiento, desarrollo y producción]Arilsulfatasa en la rizosfera de plátano, Musa AAB y relación con crecimiento, desarrollo y producción
Díaz, Manuel FranciscoLaing, D[Efecto de la fertilizacion foliar en el rendimiento y en el contenido de carbohidratos, nitrogeno, fosforo y potasio en frijol (Phaseolus vulgaris L.)]Efecto de la fertilizacion foliar en el rendimiento y en el contenido de carbohidratos, nitrogeno, fosforo y potasio en frijol (Phaseolus vulgaris L.)

Climbing common bean (Phaseolus vulgaris L.) genotypes have among the highest yield potential of all accessions found in the species. Genetic improvement of climbing beans would benefit from an understanding of the inheritance of climbing capacity (made up of plant height [PH] and internode lengt...


Checa Coral, Oscar E.Ceballos, H.Blair, Matthew W.[Generation means analysis of climbing ability in common bean (Phaseolus vulgaris L.)]Generation means analysis of climbing ability in common bean (Phaseolus vulgaris L.)

To satisfy farmer and consumer preferences, breeding efforts to increase yield potential in common bean must take into account the interrelated effects of growth habit, seed size, maturity, and gene pool on yield expression in segregating populations. To examine the relationships among these trai...


Kornegay, Julia L.White, Jeffrey W.Ortiz de la Cruz, O.[Growth habit and gene pool effects on inheritance of yield in common bean]Growth habit and gene pool effects on inheritance of yield in common bean

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