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Interactions of lime, phosphorus (P), and zinc (Zn) in two coarse-textured Ultisols from southeastern Nigeria were examined by means of factorial soil incubation and phosphate sorption experiments. In both soils, liming reduced exchangeable aluminum (Al) saturation from 45% to < 5% at pH 5.0 and ...


Friesen, Dennis K.Juo, A.S.R.Miller, M.H.[Liming and lime-phosphorus-zinc interactions in two Nigerian Ultisols: I. Interactions in the soil]Liming and lime-phosphorus-zinc interactions in two Nigerian Ultisols: I. Interactions in the soil
Amézquita Collazos, EdgarFriesen, Dennis K.Sanz Scovino, José Ignacio[Indicadores de sostenibilidad: parámetros edafoclimáticos y diagnóstico del perfil cultural]Indicadores de sostenibilidad: parámetros edafoclimáticos y diagnóstico del perfil cultural

Maize stover left after grain harvest constitutes an important source for livestock feed in most parts of East Africa, particularly during the dry season. In spite of its wide use and greater importance, breeding programs have given little attention to the improvement of stover quality and quanti...


Ertiro, B.T.Twumasi-Afriyie, S.Blümmel, MichaelFriesen, Dennis K.Negera, D.Worku, M.Abakemal, D.Kitenge, K.[Genetic variability of maize stover quality and the potential for genetic improvement of fodder value]Genetic variability of maize stover quality and the potential for genetic improvement of fodder value
Ertiro, B.T.Zeleke, H.Friesen, Dennis K.Blümmel, MichaelTwumasi-Afriyie, S.[Relationship between the performance of parental inbred lines and hybrids for food-feed traits in maize (Zea mays L.) in Ethiopia]Relationship between the performance of parental inbred lines and hybrids for food-feed traits in maize (Zea mays L.) in Ethiopia
Oberson, AstridBünemann, Else K.Friesen, Dennis K.Rao, Idupulapati M.Smithson, P.C.Turner, B.L.Frossard, Emmanuel[Improving phosphorus fertility in tropical soils through biological interventions]Improving phosphorus fertility in tropical soils through biological interventions

Amézquita Collazos, EdgarFriesen, Dennis K.Scovino Sanz, JI[Indicadores de sostenibilidad : parámetros edafoclimáticos y diagnóstico del perfil cultural]Indicadores de sostenibilidad : parámetros edafoclimáticos y diagnóstico del perfil cultural

Friesen, Dennis K.[Soil fertility dynamics in crop rotation/agropastoral systems ("culti-core" and satellite experiments at Carimagua and Matazul)]Soil fertility dynamics in crop rotation/agropastoral systems ("culti-core" and satellite experiments at Carimagua and Matazul)

Oberson, AstridFriesen, Dennis K.Tiessen, H.Moir, JO[Effects of improved pastures and phosphorus inputs on phosphorus transformations in a Colombian oxisol]Effects of improved pastures and phosphorus inputs on phosphorus transformations in a Colombian oxisol
Thomas, Richard J.Rondón, Marco AntonioAmézquita Collazos, EdgarAyarza, Miguel AngelAsakawa, N.Friesen, Dennis K.[Overcoming soil constraints in Latin American Savannas: new approaches and potential trade-offs]Overcoming soil constraints in Latin American Savannas: new approaches and potential trade-offs
Rao, Idupulapati M.Barrios, E.Amézquita Collazos, EdgarFriesen, Dennis K.Thomas, Richard J.Oberson, AstridSingh, B.R.[Soil phosphorus dynamics, acquisition and cycling in crop-pasture-fallow systems in low fertility tropical soils: a review from Latin America]Soil phosphorus dynamics, acquisition and cycling in crop-pasture-fallow systems in low fertility tropical soils: a review from Latin America

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