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Gijsman, AJOberson, AstridTiessen, H.Friesen, Dennis K.[A cautionary note about the use of the CENTURY soil-organic-matter model for ecosystems on highly-weathered tropical low-P soils]A cautionary note about the use of the CENTURY soil-organic-matter model for ecosystems on highly-weathered tropical low-P soils

The effect of inoculating cassava with mycorrhizae on plant growth and P uptake was studied in sterilized and nonsterilized soils to which 8 levels of P were applied, as well as in a flowing culture solution at 4 different P concn. Inoculation produced greater than benefits in cassava grown in st...


Howeler, Reinhardt H.[El efecto de la inoculacion con micorrizas sobre la nutricion fosforica de la yuca]El efecto de la inoculacion con micorrizas sobre la nutricion fosforica de la yuca

The results are given of physicochemical analyses of soils and estimated cassava yields for five production zones in Colombia. There was little correlation between yield and the factors studied. Yields tended to increase as P increased; and there was a positive response to K in 2 zones and Ca/Mg ...


Díaz Duque, R.O.Howeler, Reinhardt H.Varon R, U[Evaluacion de los analisis de suelos de las zonas productoras de yuca en Colombia]Evaluacion de los analisis de suelos de las zonas productoras de yuca en Colombia

Cassava is among the food crops that tolerate soil acidity well; therefore, it is often planted on highly acid, unfertile soils without fertilization or liming. Nevertheless, cassava needs large quantities of P for maximum productivity. In fertilization trials at Carimagua (Llanos Orientales, Col...


Howeler, Reinhardt H.[Respuesta de la yuca a la aplicacion de fosforo]Respuesta de la yuca a la aplicacion de fosforo

Vertisols and soils with vertic properties are an important soil group in the Ethiopian highlands. Poor drainage, soil, water and nutrient erosion are the most serious problems on highland Vertisols. Due to their high moisture- storage capacity, they have high production potential and this potent...


Haque, I.Abebe, M.Mamo, T.Dibabe, A.[Nutrient management]Nutrient management

This paper ilustrates the principle determining cropping systems for Vertisols by reviewing work in the highlands of Ethiopia. The types of cropping systems that can be applicable in the different Vertisol environments are briefly described. These cropping systems include single cropping; multipl...


Berhe, KahsayTedla, A.Mohamed-Saleem, M.A.[Cropping systems for Vertisols in the Ethiopian highlands]Cropping systems for Vertisols in the Ethiopian highlands

Bationo, B. AndréVanlauwe, BernardAbdoulaye, MSAdamou, A.Kimetu, J.Kihara, JobTabo, RamadjitaKoala, Saidou[Increasing land sustainability and productivity through and fertility management in the West African Sudano-Sahelian zone]Increasing land sustainability and productivity through and fertility management in the West African Sudano-Sahelian zone

International Center for Tropical Agriculture[Tropical forage species : their contribution to nutrient recycling in savanna ecosystem]Tropical forage species : their contribution to nutrient recycling in savanna ecosystem

Pereira, CNFernandes, Erick C.M.Lehmann, JohannesRondón, Marco AntonioLuizao, FJ[Agroforestry trees increase phosphorus availability in an oxisol of the Brazilian humid tropics]Agroforestry trees increase phosphorus availability in an oxisol of the Brazilian humid tropics

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