1. Location: Altus, Oklahoma
2. Field size: 63 acres
3. Crop: Cotton
4. Management problem identified from yield maps: Yield loss due to blocked drain tile.
5. Cost of yield monitor and associated mapping software: Approximately $10,000.
6. Number of years yield monitoring was needed to establish spatial trends: 2 years.
7. Management response to identified problem: Invested approximately $1,500 for drain tile and leveling.
8. Return from management response: $7710 during the following year.
9. Case study contributed by Wesley Porter, Randy Taylor and CNK Farms.