The use of different tissue testing tools, and computer models are of value to the cotton grower. Input decisions based on current crop conditions are may save and money. Integrating tissue testing for potassium, and foliar K-Power applications should help the manager get a better return. The use of plant mapping with the PMAP program will make evaluation of these inputs easier. This paper will illustrate the diagnostic history, the treatment effects, and results of K-Power foliar applications on yield and quality of cotton in block demonstration trials.