Submitted to: National Information Management and Support System
Publication Type: Other
Publication Acceptance Date: 10/24/2005
Publication Date: 12/1/2005
Citation: Vories, E.D. 2005. 2005 annual report for project s1018. National Information Management and Support System. S1018 Multi-State Research Project Annual Report. P. 47-48.
Technical Abstract: Cooperative studies were continued with the University of Arkansas and Mississippi State University addressing ways to reduce the water requirements associated with rice production. A multiple inlet application strategy was applied in Arkansas and used in conjunction with intermittent flooding in Arkansas and Mississippi to conserve water. In Missouri, a study was begun to look at the potential for producing rice with subsurface drip irrigation. The studies are addressing the quantity and quality of the runoff from the fields and impacts at the watershed scale, with some investigating the year-round effects rather than just the growing season. A study was begun to address the impact of soil compaction in cotton fields on irrigation uniformity and the resulting effects on efficiency. Working cooperatively with the University of Arkansas, an updated version of the Arkansas Irrigation Scheduler was prepared and used on a limited basis. The changes include allowing the user to take advantage of extensive weather data, if available, to better estimate evapotranspiration. The less data-intensive methods used in earlier versions will also be available. Studies on optimal irrigation termination timing for cotton and soybean and the effect of different soybean production systems on water demand were continued.