Evapotranspiration of Dry Beans with Drip Irrigationby Mahdi M. Al-Kaisi, Colorado State Univ, Cortez, United States,
Adrian G. Fisher, Colorado State Univ, Cortez, United States,
Brian G. Leib, Colorado State Univ, Cortez, United States,
Mark W. Stack, Colorado State Univ, Cortez, United States,
Abstract: Information about the effect of irrigation on dry bean production in the Southwestern Colorado is very limited. The primary objective of this study is to establish a crop water use (ET) data base for evaluating dry bean response to different rates of irrigation. Soil water content at various depths in the root zone was measured by neutron attenuation. A randomized Complete Block Design (RCBD) was used in assigning five irrigation treatments: 0 ET, 0.33 ET, 0.67 ET, 1.0 ET, and 1.33 ET. Water use was estimated by using the water balance approach and the Penman equation. The results obtained agree strongly with the ET estimated by using crop coefficients developed in Nebraska. Statistical analysis revealed a significant increase in bean seed yield at 1.0 ET and 1.33 ET while dry matter production showed no significant differences at those rates.
Subject Headings: Irrigation | Soil water | Trickle irrigation | Evapotranspiration | Water content | Soil analysis | Water use | Crops | Water treatment | North America | United States | Nebraska | Colorado
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