Use of a Digital Camera to Monitor the Growth and Nitrogen Status of Cotton

Table 3

Exponential equations showing the relationships between canopy cover and the three crop properties of two cotton cultivars in experiment 1.

Cultivar	Crop property	k (mean ± SD)	b (mean ± SD)	RMSE	𝑅^2
XLZ 43	Aboveground total N content	0.712±0.019	4.285±0.020	1.483 g m^−2	0.966**
	LAI	0.452±0.034	2.622±0.101	0.483 m^2 m^−2	0.946**
	Aboveground biomass	37.175±6.092	4.206±0.207	110.714 g m^−2	0.892*
XLZ 48	Aboveground total N content	0.769±0.017	4.251±0.018	1.437 g m^−2	0.969**
	LAI	0.438±0.043	2.650±0.128	0.496 m^2 m^−2	0.924**
	Aboveground biomass	33.731±8.202	4.208±0.302	146.344 g m^−2	0.879*

Note: ∗∗indicates significant difference at 𝑃<0.01;  ∗indicates significant difference at 𝑃<0.05.