Calibration and Algorithm Development for Estimation of Nitrogen in Wheat Crop Using Tractor Mounted N-Sensor

Table 4

Pearson correlation coefficients among sensor attributes at different growth stages and crop yield.

Relationship between	Tillering	Booting	Ear emergence
Sensor value and yield	0.94	0.85	0.85
	<0.001	<0.001	<0.001
Sensor biomass and yield	0.94	0.85	0.85
	<0.001	<0.001	<0.001
Sensor NDVI and yield	0.92	0.87	0.72
	<0.001	<0.001	0.0006