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Establecimiento de praderas por el método de siembra rala by Spain, James M., Gualdron Acosta, R, Franco, T.

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Establecimiento de praderas en sabanas bien drenadas de los Llanos Orientales de Colombia [conjunto audiotutorial] by Spain, James M., Fuentes de Piedrahíta, Cilia L., Barona, AM

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El reciclaje de nutrimentos en pastos tropicales by Spain, James M., Salinas, José G.

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Differential species and varietal tolerance to soil acidity in tropical crops and pastures by Spain, James M., Francis, C.A., Howeler, Reinhardt H., Calvo, FA

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Establishment and initial development of Andropogon gayanus pastures in tropical savannas by Spain, James M., Couto, W.

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Establecimiento y desarrollo inicial de pasturas de Andropogon gayanus en sabanas tropicales by Spain, James M., Couto, W.

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Tropical pastures target environments by Spain, James M., Ayarza, Miguel Angel

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Methodological challenges in pasture research by Lascano Aguilar, Carlos Eduardo, Spain, James M.

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The role of pastures in production systems by Thomas, Richard J., Lascano Aguilar, Carlos Eduardo, Sanz Scovino, José Ignacio, Ara, MA, Spain, James M., Vera, Raúl R., Fisher, Myles J.

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Soil-plant factors and processes affecting productivity in ley farming by Rao, Idupulapati M., Ayarza, Miguel Angel, Thomas, Richard J., Fisher, Myles J., Sanz Scovino, José Ignacio, Spain, James M., Lascano Aguilar, Carlos Eduardo

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Establecimiento y manejo de pasturas de Centrosema by Mendoza M., Pablo E., Thomas, D., Spain, James M., Lascano Aguilar, Carlos Eduardo

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Efeito de sistemas de pastejo sobre a produtividade de pastagens consorciadas nos Cerrados do Brasil by Leite, GG, Spain, James M., Vilela, Lourival, Gomide, CCC, Rocha, C.M.C. da

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El uso eficiente de recursos e insumos en el establecimiento y mantenimiento de pastos tropicales by Spain, James M., Castilla, Carlos E., Franco, T.

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A flexible grazing management system proposed for the advanced evaluation of associations of tropical grasses and legumes by Spain, James M., Pereira, JM, Gualdron, R

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Pasture establishment and management in the Llanos Orientales of Colombia by Spain, James M.

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Estrategias para mejorar la eficiencia de utilizacion de sabanas nativas en el tropico humedo by Spain, James M., Lascano Aguilar, Carlos Eduardo

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Preliminary observations on the effect of competitive interference on stand maintenance of Stylosanthes capitata associated with Andropogon gayanus in the Eastern plains of Colombi... by Valencia, I.M., Spain, James M.

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Establecimiento y manejo de pastos en los Llanos Orientales de Colombia by Spain, James M.

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Conferencia sobre Investigación Agrícola y Uso de la Tierra en la Amazonía (1980, Cali, Colombia). Amazonia: investigación sobre agricultura y uso de tierras: memorias by Hecht, S.B., Nores, G.A., Sánchez, P.A., Spain, James M., Toenniessen, G.

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International Conference on Amazonian Agriculture and Land Use Research (1, 1980, Cali, Colombia). Amazonia: agriculture and land use research: Proceedings by Hecht, S.B., Nores, G.A., Sánchez, P.A., Spain, James M., Toenniessen, G.

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