Water deficit constitutes a major constraint in crop production generally and rice particularly. Rainfall is the most critical and least predictable among climatic factors, and both the distribution and amount of rainfall during the cropping season are key determinants of crop yields, particularly in areas with less than 2000 mm of annual precipitation such as the Northern Region of Ghana. When torrential rains fall on less porous soils in areas with undulating topography, large amounts of water are lost as runoff from farmlands, resulting in moisture stress at the most critical stages of crop development.Water conservation constitutes one of the greatest challenges to agriculture in developing countries, and simple on-farm water conservation techniques are critical for sustainable agricultural production. To extend the capacities of Agricultural Extension Agents (AEAs) to train farmers in sustainable crop production systems, AEAs were trained in on-farm water harvesting and conservation techniques, and demonstration fields utilizing the on-farm water conservation technique of bunding were established with two rice varieties (Jasmine 85 and Togo Marshall). Field days were organized for farmers and AEAs to observe the use of bunds as a water conservation technique.Mean yield in the treatment plots was 3.51 t/ha as against 2.93 t/ha for control plots (bunding increased paddy yield by 24% in Jasmine 85 and 14% in Togo Marshall). Given the trend of declining annual rainfalls in Ghana, maximizing conservation of runoff rainwater is vital. The prudent utilization of rainwater and conservations practices pays off by maximizing rice production under rainfed conditions. Rainwater harvesting and conservation is therefore emerging as a viable long-term strategy to tackle crop yield losses associated with moisture stress.