Before-and-after tests on emitters show organic fertilizers can be injected through low-volume irrigation systems
California Agriculture 46(5):21-23. DOI: 10.3733/ca.v046n05p21.
The practice of injecting organic fertilizers into low-volume irrigation systems is not widespread, partly because of concerns that the materials will clog emitters. This study looks at two spray-dried organic fertilizers (fish protein and poultry protein) that were injected through various low-volume irrigation systems, and finds only minimal clogging and even distribution of fertilizer throughout the irrigated area.
L. J. Schwankl is Extension Specialist, Department of Land, Air, and Water Resources, UC Davis; G. McGourty is Farm Advisor, Mendocino County.
The authors would like to acknowledge the assistance of Jerry Ball of California Spray by Company of Stockton, Calif; Bruce Wyatt, UC Area Marine Advisor; Chuck Vaughn of the UC Hopland Field Station; Jim Anshutz of Netafim Irrigation, Inc.; Al Smith of Bowsmith, Inc.; and Dan Schuler of Hardie Irrigation.