Chemigation is the application of fertilizers and pesticides to agricultural crops with irrigation water. Chemicals are also injected into microirrigation systems in order to prevent microorganisms and calcium carbonate from clogging drip emitters. Microorganisms are killed by injecting chlorine or other disinfectants. Calcium carbonate precipitation is prevented by injecting acid and lowering pH. The potential hazards associated with chemical storage, transport, and injection into irrigation water include precipitation of solids within the irrigation water and clogging of the drip system, production of poison gas, explosions, contamination of the environment, and burning or loss of eyesight from chemical splashing. This chapter describes acid injection for prevention of calcium carbonate deposition, chlorine injection for control of fungal and bacterial growth, and the application of fertilizer and non-fertilizer materials into microirrigation systems.


Fertigation Pestigation Carbonate deposition Acid injection Biological control Fertilizer 


  1. The Evans and Waller document is the original source of much of this chapter. Dr. Evans was a Federal employee so there is no copyright.Google Scholar
  2. Bar-Yosef B (1999) Advances in fertigation. Adv Agron 65:2–77. Academic PressGoogle Scholar
  3. Burt CM, O’Connor K, Ruehr T (1995) Fertigation. Irrigation Training and Research Center, California Polytechnic State University, San Luis Obispo, p 320Google Scholar
  4. Evans and Waller (2006) Chemigation. (Ed) Freddy Lamb. Americaan Society of Agricuitural and Biological. Engineers, Published ASABE Irrigation Monograph, St. JosephGoogle Scholar
  5. Granberry DM, Harrison KA, Kelley WT (2001) Drip chemigation: injecting fertilizer, acid and chlorine, vol 1130, Bull. University of Georgia, College of Agricultural and Environmental Science, Cooperative Extention Service, Athens, p 13Google Scholar
  6. Rosen CJ, Eliason R (1996) Nutrient management for commercial fruit & vegetable crops in Minnesota. University of Minnesota Ext. Pub. BU-05886. 61 pp.

Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  1. 1.Agricultural and Biosystems EngineeringUniversity of ArizonaTucsonUSA

Personalised recommendations