Avocado and citrus orchards along the coast may use less water
AuthorsMark E. Grismer
Richard L. Snyder
Ben A. Faber
Authors AffiliationsM.E. Grismer is Professor and Agricultural Drainage Engineer; R.L. Snyder is Biometeorologist, Department of Land, Air and Water Resources, UC Davis; B.A. Faber is Soil and Water Extension Advisor, UC Cooperative Extension, Ventura County.
Hilgardia 54(3):25-29. DOI:10.3733/ca.v054n03p25. May 2000.
Most citrus and avocado water-use studies have been conducted in inland orchards; however, orchards located in coastal areas are subject to cooler temperatures and foggier atmospheric conditions. To develop coastal area crop coefficients (Kc values) for irrigation management, we measured orchard consumptive water use (ETc) from two different commercial orchards located near Ventura. In addition to coastal climate variability, the ETc measurements were complicated by the wide variability in field soil, slope and elevation. On average, we measured Kc values of 0.46 for young lemons, 0.52 for mature lemons and 0.64 for mature avocados. These values were slightly less than those published, perhaps as a result of greater fog conditions in the orchards as compared to those occurring at the nearest reference ET stations.
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