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Peanut Yield and Grade with Surface Drip Irrigation

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  032098,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13778) @2003
Authors:   Heping Zhu, Marshall C. Lamb, Christopher L. Butts, Paul D. Blankenship
Keywords:   Peanut, Surface drip irrigation, Yield, Kernel size, Topography

A surface drip irrigation system was developed to irrigate peanuts in two topographic fields. Peanut pod yield, kernel size distribution, and total sound mature kernels were evaluated with two peanut varieties, two planting patterns and two drip tape lateral spacings. Test results were compared with the adjacent non-irrigated area planted with the same varieties of peanuts. Soil temperature and volumetric moisture content were measured at different locations to track soil temperature and water movement from drip tapes. The maximum soil temperature in the irrigated area was substantially lower than in the nonirrigated area. About 16 h were required for water to travel 46 cm and then hold the moisture for 14 h before decreasing after either 12.5 mm or 25 mm irrigation was applied. No significant difference (p<0.05) was observed in yields between 0.91-m and 1.82-m drip tape lateral spacings with surface drip irrigation. Peanut yields with surface drip irrigation were 1.43 times the non-irrigated yield. The net yield gain from surface drip irrigation was 10 kg/ha-mm during the two growing seasons. Yields tended to slightly decrease as the land elevation decreased for both irrigated and non-irrigated zones. Compared to the nonirrigated areas, the drip irrigated area produced more large kernels than small kernels.

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