A technique to study mycorrhizal effects on growth and P-uptake of cassava (Manihot escultenta, Crantz) grown in flowing solution culture is described. Phosphorus concentrations were carefully maintained constant at 0.1, 1, 10 and 100 ?M by daily analyses and adjustment of the nutrient solutions....
Howeler, Reinhardt H.
,
Edwards, D.
,
Asher, CJ
,
[Application of the flowing solution culture techniques to studies involving mycorrhizas]
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Application of the flowing solution culture techniques to studies involving mycorrhizas
Research aimed at developing various Stylosanthes species as forage crops in South America began with the collection of Brazilian germplasm in the 1960s. These efforts have intensified greatly in the past 25 years with the participation of a number of local, national and international institution...
Miles, John W.
,
Lascano, Carlos E.
,
[Status of Stylosanthes development in other countries. I. Stylosanthes development and utilisation in South America]
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Status of Stylosanthes development in other countries. I. Stylosanthes development and utilisation in South America
Greenhouse studies on pathogenic variability of Xanthomonas manihotis did not reveal the occurrence of distinct pathogenic races. The non-race status of the pathogen suggests that CBB could be well-controlled in the field by using known levels of genotype resistance in specific ecosystems and by ...
Elango, Fritz
,
Lozano, J.C.
,
[Pathogenic variability of Xanthomonas manihotis, the causal agent of cassava bacterial blight]
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Pathogenic variability of Xanthomonas manihotis, the causal agent of cassava bacterial blight
Nuestro informe comienza y termina en una granja del centro de Etiopia cuyos agricultores, dedicadosa la produccion mixta ganado-cosechas, comienzan ahora a participar en el creciente mercado de productes lacteos de la capital del pais, Addis Abeba. Entretanto, exploraremos la anatomia de la revo...
International Livestock Research Institute
,
[ILRI 1999: hacer que la revolucion ganadera beneficie a los pobres]
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ILRI 1999: hacer que la revolucion ganadera beneficie a los pobres
High elevation páramo (wetland) ecosystems in the Andes are important water sources for local communities and downstream agricultural and urban users. These headwater catchments, however, are often impacted by human activities (eg agricultural production) that affect both stream water quality and...
Roa Garcia, MC
,
Roa Garcia, CE
,
Brown, S.
,
Cordero, E.
,
[Water resource research and education in mountain communities]
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Water resource research and education in mountain communities
Demands for food and fiber are increasing at a faster rate than supply in the medium and high altitude zones of Eastern Africa, while the productivity of the land is apparently declining. In many cases, productivity is constrained primarily by insufficient nutrient supply. To meet future demands ...
Wortmann, Charles S.
,
[Research for sustainable agricultural production systems in high altitude zones of Eastern Africa]
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Research for sustainable agricultural production systems in high altitude zones of Eastern Africa
The background and current status of research on bean N fixation in Rwanda, Burundi, Zimbabwe, Tanzania, Malawi, Uganda, and Ethiopia are summarized. The 4 stages of the methodological framework for bean N fixation research of CIAT are described: (I) (a) Rhizobium strain isolation and characteriz...
Nyabyenda, P
,
Hakizimana, A
,
Kipe-Nolt, Judith A.
,
Davis, J.
,
Graf, W
,
[Atelier sur la Fixation Biologique d`Azote du Haricot en Afrique = Workshop on Biological Nitrogen Fixation of Beans in Africa (1988, Rubona, Rwanda). Actes = Proceedings]
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Atelier sur la Fixation Biologique d`Azote du Haricot en Afrique = Workshop on Biological Nitrogen Fixation of Beans in Africa (1988, Rubona, Rwanda). Actes = Proceedings
Grisley, W
,
[Workshop on National Research Planning for Bean Production in Uganda (1991, Kampala, Uganda). Proceedings]
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Workshop on National Research Planning for Bean Production in Uganda (1991, Kampala, Uganda). Proceedings
Nyabyenda, P
,
Scheidegger, Urs C.
,
[Seminaire Regional sur l`Amelioration du Haricot dans la Region des Grands Lacs (6, 1991, Kigali, Rwanda). Actes]
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Seminaire Regional sur l`Amelioration du Haricot dans la Region des Grands Lacs (6, 1991, Kigali, Rwanda). Actes