TY - JOUR AU - Schwankl, Larry AU - Frate, Carol A. TI - Alternative techniques improve irrigation and nutrient management on dairies JF - California Agriculture JO - Calif Agr Y1 - 2004/07/01 VL - 58 IS - 3 SP - 159 EP - 163 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://dx.doi.org/10.3733/ca.v058n03p159 L3 - 10.3733/ca.v058n03p159 AB - Many of the dairies in California's Central Valley use a water flush system for manure handling; the manure water is eventually mixed with freshwater and applied to cropland during irrigation. Good performance during irrigation applications is important due to the nutrients in the manure water. This project evaluated alternative management techniques (furrow torpedoes, surge irrigation and shortening furrow lengths) for improving irrigation practices on dairies. All three techniques reduced the amount of water required for irrigation. The project also investigated the impact of changing the timing of manurewater additions to the fresh irrigation water. Delaying the addition of manure water until the advancing fresh irrigation water had reached approximately 80% of the distance down the field improved nutrient-application uniformity and reduced nutrient applications.