The development of water and weed management technologies and practices for irrigated agriculture in water deficit areas that use water efficiently, improve agricultural productivity, sustainability and reduce negative environmental impacts. GOALS Conduct a 5 yr. field trial with a 4 crop rotation (Wheat, Sunflower, Corn, Dry Beans) under 2 tillage practices (conventional, minimum) and 5 levels of irrigation (rain fed to full irrigation). Schedule irrigations based on weather, crop responses, and crop models. Develop water production functions for each crop (“Crop per Drop”), and better understanding of crop stress responses. Develop weed management practices under limited irrigation conditions. Determine the economic returns for each level of irrigation and how to optimally allocate a limited water supply.   Water Management Research Unit Natural Resources Research Center 2150 Centre Avenue, Building D, Suite 320 Fort Collins, Colorado 80526-8119 Phone: 970-492-7400 The User-friendly URL of this page is: http://www.ars.usda.gov/npa/ftcollins/wmr