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Rusike, J and Masendeke, D and Twomlow, S J and Heinrich, G M (2004) Impact of Farmer Field Schools on Adoption of Soil Water and Nutrient Management Technologies in Dry Areas of Zimbabwe: Global Theme on Agro-Ecosystems Report no. 14. Research Report. International Crops Research Institute for the Semi-Arid Tropics , Bulawayo, Zimbabwe.
Saxena, N P and John, O C (2002) Field Screening for Drought Tolerance in Crop Plants with Emphasis on Rice. Manual. International Crops Research Institute for the Semi-Arid Tropics.