Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Proceedings
Publication Acceptance Date: June 19, 1994
Publication Date: N/A
Interpretive Summary: A field comparison of low elevation spray and Low Energy Precision Application (LEPA) type application for center pivots was conducted for two years on corn in southern Idaho. Results indicate a slight benefit for the LEPA system in terms of reduced evaporation loss, but the sprays had less runoff and yield differences were insignificant.
Technical Abstract: A field evaluation of the Low Energy Precision Application (LEPA) system compared to a Low Elevation Spray System (LESS) of applying water with center pivot irrigation was conducted for two years in southern Idaho. A linear traveling lateral was used. The systems used same gross water application on corn. Soil water measurements and ET calculations indicated that the LEPA method increased application efficiency by about 5% by reducing spray and surface evaporation loss. However, runoff was greater with the LEPA system, and yields were not significantly different between the two systems.