Evaluation of a Reduced Cost Active NDVI Sensor for Crop Nutrient Management

Table 4

Simple linear regression between pocket sensors (PSs) and GreenSeeker sensors, V4–V10 growth stages in maize, Ciudad Obregon, Mexico, 2011.

Sensor	Crop	𝑛	Test variable	𝑟^2	Estimate	Pr > ItI	Lower 95%; confidence limit	Upper 95%; confidence limit
PS#37	Maize	289	Intercept = 0	0.912	0.010	0.236	−0.006	0.025
PS#37	Maize		Slope =1		0.995	0.787	0.960	1.031
PS#27	Maize	95	Intercept = 0	0.913	−0.015	0.315	−0.043	0.014
PS#27	Maize		Slope = 1		1.044	0.188	0.978	1.111

Pocket sensor: independent variable.
GreenSeeker: dependent variable.
𝑛: sample size.