Context. The morphology-density relation manifests the environmental dependence of formation and evolution galaxies as they continuously migrate through cosmic web to ever denser environments. As gas-rich traverse outskirts inner regions galaxy clusters, experience sudden radical changes in their gas content star activity. Aims. goal this work is gain an H I perspective on depletion mechanisms ...

the aim of this study was to investigate the effect of tillage methods to obtain suitable seedbed for monogerm seed. therefore, a split plot experiment based on a randomized complete block design (rcbd) with three replicatians was conducted at darab station of fars province. the main plot was seedbed prepration at two levels including fall and spring season. subplot included 1) moldboard plow a...