This document discusses anti-transpirants and their effects on crops. It provides information on the types of anti-transpirants including stomatal closing, film forming, reflectant, and growth retardants. It also discusses the effects of anti-transpirants such as potentially increasing crop yields under stressed conditions. Specifically, one study found grain yields of sorghum increased 5-17% when anti-transpirants were applied before the boot stage under limited irrigation. The document also provides examples of crop planning and cropping systems suitable for different soil depths and rainfall regions.