Table 7. Results of the stepwise regression models for remotely sensed rice yield using AVHRR-derived NDVI measures as independent variables.

Study areas	Model	R	F-test value	RMSE
HLJ	YRS = −849.158+0.137NDVImaxa1	0.42*	4.508	361.99
HN	YRS  = −1240.690+0.229 mNDVImaxb1-a2	0.69**	19.342	114.57
JX	YRS  = −1553.145+0.261 mNDVImaxb1-max	0.46**	5.689	166.38
SC	YRS  = −1495.515+0.403 mNDVImaxb4-b3	0.73**	24.238	207.07
GX	YRS  = −1832.285+1.138 mNDVImaxb4-b3 + 0.214NDVImaxa2 – 1.315 mNDVImaxb4-b2+0.307 mNDVImaxb2-b1	0.92**	25.103	87.70

R: multiple correlation coefficient.

^*significant at 0.05 level; ** significant at 0.01 level.