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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
van Duivenbooden, N and Pala, M and Studer, C and Bielders, C L and Beukes, D J (2000) Cropping systems and crop complementarity in dryland agriculture to increase soil water use efficiency: a review. NJAS - Wageningen Journal of Life Sciences, 48 (3). pp. 213-236. ISSN 15735214
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
van Duivenbooden, N and Pala, M and Studer, C and Bielders, C L and Beukes, D J (2000) Cropping systems and crop complementarity in dryland agriculture to increase soil water use efficiency: a review. NJAS - Wageningen Journal of Life Sciences, 48 (3). pp. 213-236. ISSN 15735214
van Duivenbooden, N and Pala, M and Studer, C and Bielders, C L and Beukes, D J (2000) Cropping systems and crop complementarity in dryland agriculture to increase soil water use efficiency: a review. NJAS - Wageningen Journal of Life Sciences, 48 (3). pp. 213-236. ISSN 15735214