This chapter contains excerpts from the California Master Gardener Handbook, 2nd Edition; D. Pittinger et al. UC ANR Publication #3382; ISBN #978-1-60107-857-5. The Regents of the University of California. Copyright 2015. Used by permission.

1. Values do not apply to any plant production operations, such as nurseries, greenhouses, sod farms, or commercial farms.

2. Plant Factor shown is the annual average value; monthly or seasonal factors may be available if more precision is desired.

3. Plant Factor does not apply to sports fields, golf greens or tees.

4. Data adapted from:

  • ANSI/ASABE Standard S623, Determining Landscape Plant Water Requirements, American Society of Agricultural and Biological Engineers. Oct 2015. Web. 11 April 2017.
  • Meyer, J.L., V.A. Gibeault, and V.B. Youngner. International Turfgrass Research Conference. Irrigation of Turfgrass below Replacement of Evapotranspiration as a Means of Water conservation: Determining Crop Coefficient of Turfgrasses. 1985. France. Sports Turf Research Institute. 1985.

5. CIMIS Station Reports. California Irrigation Management Information System. Web. April 2017.

6. Hartin, Janet. Re: Quote about 80%. Message to Pam Pavela. April 14, 2017. Email. 

7. Rain Bird Corporation. Project PRS: Study of Pressure Regulated Versus Non-Pressure Regulated Sprays and Rotors. Metropolitan Water District of Southern California Innovative Conservation Program. 2014.

8. Snyder, R.L. Irrigation Scheduling: Water Balance Method [Basic Irrigation Scheduling]. UC Davis Biometerology Group. 2014. Web. 11 April 2017.