chemigationn.
/ˌkɛmɪˈɡeɪʃn/, U.S. /ˌkɛmiˈɡeɪʃ(ə)n/ Agriculture. Chiefly U.S.
The practice of applying chemicals such as pesticides or fertilizers to crops by means of irrigation water.
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the world > food and drink > farming > cultivation or tillage > preparation of land or soil > irrigation > [noun]
field pondage1612
pondage1612
irrigation1626
floating-trench1649
masterwork1652
floating1669
catchwork1794
warping1799
watering1799
basin irrigation1903
sprinkler irrigation1908
sprinkling irrigation1910
spray irrigation1931
spray line1961
trickle irrigation1969
chemigation1981
1981 E. D. Threadgill Proc. National Symp. Chemigation 1 Chemigation..can be defined as the application of a chemical (nutrient, herbicide, insecticide, fungicide, nematicide, etc.) via an irrigation system by injecting the chemical into the water flowing through the system.
1993 R. L. Zimdahl Fund. Weed Sci. xix. 389 (table) For chemigation only.
2007 Western Farm Press (Nexis) 7 Apr. 26 Their 2006 trials showed..herbicide applied by chemigation via surface or buried drip tape to have a greater than tenfold effect in controlling shepherd's purse and total weed densities as opposed to spraying the material and irrigating by sprinkler.
This is a new entry (OED Third Edition, December 2008; most recently modified version published online March 2022).
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n.1981