In this study NDVIC

assigned as the NDVI value in an effort to eliminate the influence of rainfall

based on time series of rainfall data and temporal SPOTVEG NDVI data

was used to evaluate the effects of "Grain for Green " project for the period 1998-2005 in Yulin

Yan'an

Xi'an and Ankang of Shaanxi Province.A strong relationship existed between rainfall and integrated NDVI(monthly) for all four sampling domains(R = 0.27 to 0.82)

while the correlation coefficient increased from south to north.Vegetation coverage has increased in Yan'an from 1999 to 2005

especially in 2002-2005

showing some correlation with the climate variables

especially rainfall(1 month time-lagged)

but precipitation alone don't fully explain the increased green cover.Increased NDVIC in October expresses an obvious effect of GFG on the vegetation change.It provided a thought for objective and repeatable evaluation of effects of "Grain for Green" program.