remote sensing is one of the techniques recently used in order to monitoring and predicting crop yield. the objective of this study was predicting wheat yield in mashhad during 2009 and 2010 by landsat (tm) and (etm+) images with ground based data. for this purpose, three images dated 6, 14 and 22 jun 2009 and 8 and 24 may and 9 jun 2010 were analyzed and vegetation indices were computed. field...