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

Table 2

Pearson correlation coefficients among different sensor attributes and Lab N at different growing stages of crop.

Relationship between	Tillering	Booting	Ear emergence	Overall
Sensor value and Lab N	0.85	0.63	0.64	0.68
	<0.001	<0.001	<0.001
Sensor biomass and Lab N	0.87	0.610	0.57	0.58
	<0.001	0.0067	0.0132
Sensor NDVI and Lab N	0.90	0.49	0.41	0.34
	<0.001	0.0364	0.0872