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Graef, F and van Duivenbooden, N and Stahr, K (1998) Remote sensing and transect-based retrieval of spatial soil and terrain (SOTER) information in semi-arid Niger. Journal of Arid Environments, 39 (4). pp. 631-644. ISSN 01401963
Rebafka, F P and Hebel, A and Bationo, A and Stahr, K and Marschner, H (1994) Short- and long-term effects of crop residues and of phosphorus fertilization on pearl millet yield on an acid sandy soil in Niger, West Africa. Field Crops Research, 36 (2). pp. 113-124. ISSN 0378-4290
Graef, F and van Duivenbooden, N and Stahr, K (1998) Remote sensing and transect-based retrieval of spatial soil and terrain (SOTER) information in semi-arid Niger. Journal of Arid Environments, 39 (4). pp. 631-644. ISSN 01401963
Rebafka, F P and Hebel, A and Bationo, A and Stahr, K and Marschner, H (1994) Short- and long-term effects of crop residues and of phosphorus fertilization on pearl millet yield on an acid sandy soil in Niger, West Africa. Field Crops Research, 36 (2). pp. 113-124. ISSN 0378-4290