Field Sensing Exercise (March 6, 2002)

Agronomy Experiment Station:

Wednesday, March 6, 2002

Farm road west to Hall of fame

Hall of fame to Virginia

Go west on Virginia, ¼ mile (#222 is on the left)

1. Collect hand-held sensor readings from 10 plots

Treatments (Reps 1 and 3)

1. 0-60-40

2. 40-60-40

3. 80-60-40

4. 120-60-40

8 (vs #3 is K response) 80-60-0

2. Assign a visual score (1-5) to each plot

3. Plot NDVI readings versus visual score

4. Plot N rate (treatmens 1-4) versus NDVI

5. Plot N rate (treatments 1-4) versus visual score

6. Plot visual score versus NDVI

7. Question: Was N rate correlated with NDVI?

At what rate did NDVI peak?

Can NDVI be used to replace visual scores?

8. Did your NDVI reading pick up differences due to K fertilization (8 vs 3)?