Make control decisions based upon projected yield at the time of infestation. Weed control is important under drought conditions. Weeds are very effective competitors for moisture. Make weed control decisions early when low herbicide rates are still effective. Consider using low rates of sulfonyurea herbicides preemergence if you know populations of broadleaf weeds are heavy.
Irrigation management is particularly important in years with little rainfall.
Base irrigations on PET evaporative models or in field resistance meters. The preplant and pre-bloom irrigations are the most important and should not be missed if at all possible. Use all or a combination of the other practices listed above to reduce water use and increase efficiency.