Comparison of SDI, LEPA, and Spray Irrigation Efficiency.
Authors:
Schneider, A.D. Howell, T.A. Evett, S.R. USDA, ARS
Source:
Paper. 2001, no. 012019, 14 p.
NALT Subjects:
Sorghum bicolor grain sorghum irrigated farming subsurface irrigation microirrigation sprinkler irrigation irrigation systems water use efficiency grain yield deficit irrigation irrigation rates evapotranspiration Texas
Other Subjects:
low energy precision application irrigation LEPA irrigation subsurface deficit irrigation
Issue Date:
2001
Abstract:
The SDI, LEPA, and spray irrigation methods were compared for irrigation of grain sorghum on a fine textured soil in the southern High Plains. Full irrigation was defined as that required to meet evapotranspiration calculated using grass reference ET computed with a Penman-Monteith equation and locally derived crop coefficients. With deficit irrigation at 25 and 50% of full irrigation, grain yields with SDI were significantly larger than with the other irrigation methods. At the 75% and full irrigation levels, however, the grain yields with spray irrigation exceeded 10.0 Mg/ha and were significantly larger than those for the SDI, and LEPA methods.
