Cotton Sensor Research Update

1
Cotton Sensor Research Update

• Randy Taylor, JC Banks, Shane Osborne, Tim Sharp,
  John Solie, and Bill Raun

2
Mobile Sensor Platform
3
GreenSeeker Data

• Measuring NDVI directly over the row with four
  sensors and between the rows with three sensors
• Collected data from research plots and farmers
  fields on multiple dates

4
NDVI from Farmers Fields
June 28-29, 2006 over-the-row data only
5
Experiment 439

• Long term N, P, and K fertility plots
• 14 treatments and 4 reps
• Sensed on June 19 and July 25

6
July 25 Fertility Plots
7
2006 Yield
8
Sensor Data July 25
9
Plant Height for 2005-06
10
Estimating Canopy Closure
11
NDVI Over the Row
Coron Plots Altus 2006
12
NDVI Between Rows
R20.79
13
NDVI Ratio BR/OR
R20.72
Coron Plots Altus 2006
14
NDVI by Initial N Applied
Significant Difference
15
Sensing Date and Sensor Location
Date Over-the-Row Row Middle
6/28 NS NS
7/17 NS NS
8/01 NS NS
8/09 NS Trt, Fert
8/15 NS Fert
8/30 NS Fert