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Pala, M and Beukes, D J and Dimes, J P and Myers, R J K (2005) Management for improved water use efficiency in the dry areas of Africa and West Asia: proceedings of a Workshop, Ankara, Turkey, 22-26 Apr 2002. Other. International Crops Research Institute for the Semi-Arid Tropics.
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
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