the official iranian calendar is a solar one that in both the length and the first day of its year is based not on convention, but on two natural (i.e. astronomical) factors: a) the moment of coincidence of the centre of the sun and the vernal equinox during the sun’s apparent revolution around the earth; and b) the time length between two successive apparent passages of the sun’s center across...

relationship between grain yield and its component traits can improve the efficiency of breeding programs by determining appropriate selection criteria. an investigation was carried out on barnyard millet (echinochloa spp.) global germplasm collection to investigate the association among yield components and their direct and indirect effects on the grain yield of barnyard millet. the experiment...

converting the organic wastes and losses into compost is an appropriate technique to stabilize organic materials. one of the limitative factors in transporting and storing the composts is their low specific mass which usually leads to increase costs in their processing. to overcome this limitation, several methods such as pelleting have been proposed especially for efficient processing of powde...