Estimation of area- and mass-based leaf nitrogen contents of wheat and rice crops from water-removed spectra using continuous wavelet analysis

Table 4 Assessment of LMA, N_area and N_mass estimations generated with the direct ways and the indirect way

Dependent variables	Explanatory variables	MR spectra		Explanatory variables	WR spectra
Dependent variables	Explanatory variables	R ²	RMSE	Explanatory variables	R ²	RMSE
LMA	WF_2273,4	0.60	5.09	WF_1578,4	0.63	4.88
LMA	ND_2236,2247	0.46	5.93	ND_1716,1727	0.50	5.71
N_area	WF_2060,3	0.56	0.25	WF_2181,4	0.72	0.19
N_area	ND_2192,2202	0.25	0.32	ND_1749,1773	0.32	0.31
N_mass-direct	WF_2053,3	0.65	0.44	WF_2113,4	0.64	0.44
N_mass-direct	ND_2283,2286	0.29	0.63	ND_2153,2154	0.14	0.69
N_mass-indirect	WF_2273,4, WF_2060,3	0.61	0.46	WF_1578,4, WF_2181,4	0.79	0.34
N_mass-indirect	ND_2236,2247, ND_2192,2202	0.01	0.74	ND_1716,1727, ND_1749,1773	0.26	0.64

ISSN: 1746-4811