For the past ten years, the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) has been assisting Zimbabwe's farmers to adopt conservation agriculture techniques, a sustainable method of farming that can help increase yields. By applying the three principles of minimum soil disturbance, legume-based cropping and the use of organic mulch, farmers can improve infiltration, reduce evaporation and soil erosion, and build up organic soil content.