Commercial Pima cultivation was attempted in the San Joaquin Valley for the first time in 1989. Based on the average yield and quality (2.1 bales per acre and grade 3.0), Pima appears to be well adapted to the Valley's growing conditions. The variation in yield and quality from field to field was used to determine field factors that limit yield and quality. This analysis, although not completed, has identified soil SP, Ph and Zn along with planting date as potential limits to yield.