a study was conducted on six years old trees of almond, shahroud cv. (no. 18), in a three-year trial (2002-04) at mashhad agricultural research station. the experiment was done on the basis of completely randomized desigh with four replications. in the first and second years of the experiment, ethephon was sprayed in 15 and 20 days before the common time of harvesting, respectively. the concent...