Cotton Sensor Research Update Randy Taylor, JC Banks, Shane Osborne, Tim Sharp, John Solie, and Bill Raun

Mobile Sensor Platform

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

NDVI from Farmers’ Fields June 28-29, 2006 over-the-row data only

Experiment 439 Long term N, P, and K fertility plots 14 treatments and 4 reps Sensed on June 19 and July 25

July 25 Fertility Plots

2006 Yield

Sensor Data – July 25

Plant Height for 2005-06

Estimating Canopy Closure

NDVI Over the Row Coron Plots – Altus 2006

NDVI Between Rows R2=0.79

NDVI Ratio {BR/OR} R2=0.72 Coron Plots – Altus 2006

NDVI by Initial N Applied Significant Difference

Sensing Date and Sensor Location Over-the-Row Row Middle 6/28 NS 7/17 8/01 8/09 Trt, Fert 8/15 Fert 8/30