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Aufsatz
Soil organic carbon management for sustainable land use in Sudano-Sahelian West Africa
(2001)
Judged by their negative nutrient balances, low soil cover and low productivity, the predominant agro-pastoral farming systems in the Sudano-Sahelian zone of West Africa are highly unsustainable for crop production intensification. With kaolinite as the main clay type, the cation exchange capacity of the soils in this region, often less than 1 cmol_c kg^-1 soil, depends heavily on the organic carbon (Corg) content. However, due to low carbon sequestration and to the microbe, termite and temperature-induced rapid ...
Aufsatz
Multi-site time-trend analysis of soil fertility management effects on crop production in sub-Saharan West Africa
(2002)
Soil fertility constraints to crop production have been recognized widely as a major obstacle to food security and agro-ecosystem sustainability in sub-Saharan West Africa. As such, they have led to a multitude of research projects and policy debates on how best they should be overcome. Conclusions, based on long-term multi-site experiments, are lacking with respect to a regional assessment of phosphorus and nitrogen fertilizer effects, surface mulched crop residues, and legume rotations on total dry matter of cereals ...
Aufsatz
Phosphorus placement an acid arenosols of the West African Sahel
(2003)
Phosphorus (P) deficiency is a major constraint to pearl millet (Pennisetum glaucum L.) growth on acid sandy soils of the West African Sahel. To develop cost-effective fertilization strategies for cash poor farmers, experiments with pearl millet were conducted in southwestern Niger. Treatments comprised single superphosphate hill-placed at rates of 1, 3, 5 or 7 kg P ha^−1 factorially combined with broadcast P at a rate of 13 kg ha^−1. Nitrogen was applied as calcium ammonium nitrate at rates of 30 and 45 kg ha^−1. ...
Dissertation
Uncover the Concealed Link: Gender & Ethnicity-Divided Local Knowledge on the Agro-Ecosystem of a Forest Margin
(2008-01-28)
This research is a study about knowledge interface that aims to analyse knowledge discontinuities, the dynamic and emergent characters of struggles and interactions within gender system and ethnicity differences. The cacao boom phenomenon in Central Sulawesi is the main context for a changing of social relations of production, especially when the mode of production has shifted or is still underway from subsistence to petty commodity production. This agrarian change is not only about a change of relationship and ...
Zeitschrift
Journal of Agriculture and Rural Development in the Tropics and Subtropics, Heft 1, Jg. 109
(kassel university press, 2008)
Zeitschrift
Journal of Agriculture and Rural Development in the Tropics and Subtropics, Heft 2, Jg. 109
(kassel university press, 2008)
Zeitschrift
Journal of Agriculture and Rural Development in the Tropics and Subtropics, Heft 1, Jg. 110
(kassel university press, 2009)
Zeitschrift
Journal of Agriculture and Rural Development in the Tropics and Subtropics, Heft 2, Jg. 110
(kassel university press, 2009)
Zeitschrift
Journal of Agriculture and Rural Development in the Tropics and Subtropics, Heft 2, Jg. 108
(kassel university press, 2007)
Zeitschrift
Journal of Agriculture and Rural Development in the Tropics and Subtropics, Heft 1, Jg. 108
(kassel university press, 2007)