FIGURE 2-1 Crop yield and profit maps. A. Raw yield as measured on average over 25 × 25 meter cells. B. Profit variability within the field. Profit for each cell is calculated using the yield for that cell and production cost estimates for irrigated corn in North Texas. Conventional management was used over the entire field. The images above were collected from an irrigated corn field in the panhandle of Texas. The yield variability is extreme, compared to other fields in the area. However, it does document the yield and profit variability that can be found in the producer's fields. SOURCE: Maps developed by Stephen Searcy, Texas A&M University.