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

Table 3 Assessment of LMA, N_area and N_mass estimations generated with the direct and indirect ways

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	0.62	4.95	WF_1578,4	0.70	4.38
LMA	ND_2236,2247	0.60	5.12	ND_1716,1727	0.59	5.13
N_area	WF_2060,3	0.64	0.22	WF_2181,4	0.77	0.18
N_area	ND_2192,2202	0.39	0.29	ND_1749,1773	0.36	0.30
N_mass-direct	WF_2053,3	0.71	0.40	WF_2113,4	0.68	0.42
N_mass-direct	ND_2283,2286	0.31	0.62	ND_2153,2154	0.36	0.60
N_mass-indirect	WF_2273,4, WF_2060,3	0.71	0.40	WF_1578,4, WF_2181,4	0.82	0.32
N_mass-indirect	ND_2236,2247, ND_2192,2202	0.31	0.62	ND_1716,1727, ND_1749,1773	0.33	0.61

ISSN: 1746-4811