Water Application Efficiency and Adequacy of ET-Basedand Soil Moisture–Based Irrigation Controllers for Turfgrass Irrigation
| Autor: | Daniel C. Bowman, R. L. Huffman, Garry L. Grabow, A. Vasanth, Grady L. Miller, Ihab E. Ghali |
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| Rok vydání: | 2013 |
| Předmět: |
Irrigation
Environmental engineering Irrigation scheduling Low-flow irrigation systems Agricultural engineering Agricultural and Biological Sciences (miscellaneous) Irrigation water Evapotranspiration Soil water Controller (irrigation) Water content Water Science and Technology Civil and Structural Engineering Mathematics |
| Zdroj: | Journal of Irrigation and Drainage Engineering. 139:113-123 |
| ISSN: | 1943-4774 0733-9437 |
| DOI: | 10.1061/(asce)ir.1943-4774.0000528 |
| Popis: | Increasing competition for water and the desire for high-quality turfgrass require sound irrigation water management. The main objective of this study was to evaluate two types of commercially available irrigation control technologies: one based on evapotranspiration (ET) estimates and the other based on feedback from a soil-moisture sensor (SMS). Irrigation treatments were combinations of controller technology: a timer-based standard controller system (TIM), an add-on (1 set point) SMS system (SMS1), and an evapotranspiration (ET)-based system (ETB), and watering frequency: weekly, twice per week, and daily (1, 2, and 7 days per week, respectively) plus a 10th treatment of an on-demand (2 set point) SMS system (SMS2). Both irrigation efficiency and adequacy were best for the SMS2 treatment when averaged over all three years. The SMS1 treatment provided good irrigation efficiency, but irrigation adequacy suffered, most noticeably with the twice per week treatment. The ET treatment provided good i... |
| Databáze: | OpenAIRE |
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