Precision sprayers can reduce herbicide use in fallow by as much as 80 or 90%, but their high upfront costs can make the decision to purchase one difficult. There were a couple of Weeders of the West blog posts in 2021 that discussed precision spraying:
However, the technology has continued to improve since then. I just saw this post from GROW (Get Rid of Weeds) on a new calculator from Montana State University that calculates the return on investment (ROI) for annual conventional sprayer costs versus precision sprayer costs. If you are considering the purchase of a precision sprayer, you may want to check out this calculator.
For questions or comments, contact Drew Lyon via email at drew.lyon@wsu.edu or phone at 509-335-2961.