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Improving the value of maize as livestock feed to enhance the livelihoods of maize-livestock farmers in East Africa by Friesen, Dennis K.

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Genetic variability of maize stover quality and the potential for genetic improvement of fodder value by Ertiro, B.T., Twumasi-Afriyie, S., Blümmel, Michael, Friesen, Dennis K., Negera, D., Worku, M., Abakemal, D., Kitenge, K.

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Relationship between the performance of parental inbred lines and hybrids for food-feed traits in maize (Zea mays L.) in Ethiopia by Ertiro, B.T., Zeleke, H., Friesen, Dennis K., Blümmel, Michael, Twumasi-Afriyie, S.

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Phosphorus transformations in an oxisol under contrasting land-use systems: The role of the soil microbial biomass by Oberson, Astrid, Friesen, Dennis K., Rao, Idupulapati M., Buhler, S, Frossard, Emmanuel

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Sequential phosphorus extraction of a 33P-labeled oxisol under contrasting agricultural systems by Buehler, S., Oberson, Astrid, Rao, Idupulapati M., Friesen, Dennis K., Frossard, Emmanuel

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Indicadores de sostenibilidad: parámetros edafoclimáticos y diagnóstico del perfil cultural by Amézquita Collazos, Edgar, Friesen, Dennis K., Sanz Scovino, José Ignacio

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Strategic systems research for the Latin American savannas by Friesen, Dennis K., Ayarza, Miguel Angel, Thomas, Richard J., Amézquita Collazos, Edgar, Sanz Scovino, José Ignacio

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Phosphorus availability in casts of an anecic savanna earthworms in Colombian oxisol by Jiménez Jaén, J.J., Cepeda, A, Friesen, Dennis K., Decaëns, Thibaud, Oberson, Astrid

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Soil phosphorus dynamics, acquisition and cycling in crop-pasture-fallow systems in low fertility tropical soils: a review from Latin America by Rao, Idupulapati M., Barrios, E., Amézquita Collazos, Edgar, Friesen, Dennis K., Thomas, Richard J., Oberson, Astrid, Singh, B.R.

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Overcoming soil constraints in Latin American Savannas: new approaches and potential trade-offs by Thomas, Richard J., Rondón, Marco Antonio, Amézquita Collazos, Edgar, Ayarza, Miguel Angel, Asakawa, N., Friesen, Dennis K.

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Sustainability indicators: edaphoclimatic parameters and diagnosis of the cultural profile by Amézquita Collazos, Edgar, Friesen, Dennis K., Sanz Scovino, José Ignacio

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Disponibilidad de fósforo en las heces de una especie anécica de la lombriz de tierra de las sabanas de suelo oxisol en Colombia by Jiménez Jaén, J.J., Cepeda, A, Friesen, Dennis K., Decaëns, Thibaud, Oberson, Astrid

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Características del intercambio iónico en las heces de la lombriz de tierra anécica Martiodrilus carimaguensis Jiménez y Moreno, en un oxisol de una sabana de Colombia by Rangel Becerra, Andrés Felipe, Madero M, E, Thomas, Richard J., Friesen, Dennis K., Decaëns, Thibaud

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Improving phosphorus fertility in tropical soils through biological interventions by Oberson, Astrid, Bünemann, Else K., Friesen, Dennis K., Rao, Idupulapati M., Smithson, P.C., Turner, B.L., Frossard, Emmanuel

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Culticore, Ensayo de largo plazo para el desarrollo de sistemas de producción sostenibles en suelos ácidos de sabanas by Friesen, Dennis K., Amézquita Collazos, Edgar, Rao, Idupulapati M., Bernal Riobo, Jaime Humberto

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Adquisición y reciclaje de fósforo en sistemas de cultivos y pasturas en suelos tropicales de baja fertilidad by Friesen, Dennis K., Rao, Idupulapati M., Thomas, Richard J., Oberson, Astrid, Sanz Scovino, José Ignacio

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Destinos de fósforo aplicado como fertilizante en oxisoles de los Llanos Orientales de Colombia: fraccionamiento secuencial by Borrero, Gonzalo, Friesen, Dennis K., Oberson, Astrid, Rodríguez, M., Rao, Idupulapati M.

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Dinámicas de nitrógeno en monocultivos y cultivos en rotación en oxisoles de los Llanos Orientales de Colombia by Friesen, Dennis K., Thomas, Richard J., Rivera, M., Asakawa, N., Bowen, W.

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Soil physical characteristics under different land use systems and duration on the Colombian savannas by Amézquita Collazos, Edgar, Preciado Pérez, LG, Arias, D.M., Friesen, Dennis K., Sanz Scovino, José Ignacio, Thomas, Richard J.

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Opportunities for increasing the efficiency of phosphorus use in tropical agroecosystems by Rao, Idupulapati M., Barrios, E., Oberson, Astrid, Ayarza, Miguel Angel, Friesen, Dennis K.

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