1. Jan 2008 www.GeoAgris.com

2. Goals www.GeoAgris.com Test AgroFresh product under real field conditions Use PA (Precision Agriculture) to Increase operation capacity by getting data automatically Filter noise by taking into account field spatial heterogeneity Get yield response information from different stress conditions (environments) within the same paddock

3. Background www.GeoAgris.com Typical Strip design Applied Not Applied

4. Background www.GeoAgris.com 54.28 59.32 57.59 60.25 Typical Strip Design Paddock

5. Background www.GeoAgris.com Without PA technology: -strip result may be influenced by spatial heterogeneity (noise) -different responses under different stress conditions may be hidden because strip yield result is the average of different stress conditions along strip PA can: -Filter spatial heterogeneity noise -Obtain yield response information for different stress conditions

6. Methods www.GeoAgris.com Paddock selection Spatial Heterogeneity Analysis with previous years data Strip design crossing (perpendicular to) heterogeneity limits Product application and application control Combine calibration Harvest and combine control Data Analysis

7. Methods www.GeoAgris.com Paddock selection

8. Results www.GeoAgris.com La Gambeta 2007-2008 Trigo

9. Results www.GeoAgris.com Calibration Trial Harvest Max Error: 1 % combine yield monitor vs. standard scale

10. Results www.GeoAgris.com La Gambeta 2007-2008 Trigo (QQ/ha)

11. Results www.GeoAgris.com Analysis by environments of different yield potential levels

12. Results www.GeoAgris.com Analysis by environments of different yield potential levels Agregar cuadro con el rendimiento promedio de cada ambiente Trial Sensibility: 2.3 QQ/ha (3.5% yield) n = 5 significance level α = 0.05 (β=0.5)

13. Results www.GeoAgris.com Four field results (QQ/ha)

14. Results www.GeoAgris.com Sensitivity for α = 0.05 and β=0.5 if 4 repetitions and product effect is 4 QQ/ha then we will obtain 0.05 pvalue in 50% of the trials (the worst case)