Apparently it's done to dry out tough perennial weeds so that harvest can run more smoothly, and also for crop desiccation (getting the harvest to dry uniformly

Apparently it's done to dry out tough perennial weeds so that harvest can run more smoothly, and also for crop desiccation (getting the harvest to dry uniformly by killing all of the plants simultaneously). https://cropwatch.unl.edu/2020/harvest-aid-herbicide-options-soybean https://cropwatch.unl.edu/2020/harvest-aid-herbicide-options... https://en.wikipedia.org/wiki/Crop_desiccation https://en.wikipedia.org/wiki/Crop_desiccation