The method of monitoring growth vigour cf winter wheat and estimating its yield using NOAA AVHRR

Landsat MSS

and spectral data has a good result Yunchen region

south part of Shanxi province.According to agricultural productive level and conditions several regions are divided and sample areas are also selected in these regions using multi-temporal Landsat MSS

NOAA AVHRR

and spectral data. The results of these data analysis show that there are close relationships in following aspects: between spectral index-IR/Red or （IR -Red）/（IR + Red） of NOAA AVHRR

Landsat MSS and yield of winter wheat

between image density and yiel dof winter wheat

between temperature of vegetation canopy and soil moisture

between image density of NOAA AVHRR Channel 4（thermal） and yield of winter wheat.