effect of irrigation regime on grain yield, yield components and some germination attributes in grain sorghum (sorghum bicolor l. c.v. kimia)

although water deficiency has been seriously taken up as a subject in reducing crop production in arid and semi–arid areas, nevertheless little information has been published regarding its effects on seed quality. to evaluate the effects of irrigation regimes (full irrigation (control), irrigation until flowering stage, irrigation until doughing stage and irrigation until eight-leaf stage) on grain yield, yield components and some germination attributes in grain sorghum (sorghum bicolor l. cv. kimia), experiments were conducted at research farm and laboratory of agricultural college, university of tehran, karaj, iran in 2005. the experiments were arranged with a randomized complete block design (rcbd) and completely randomized design (crd) with four replications in farm and laboratory, respectively. the results idicated that irrigation levels had significant effects on grain yield and yield components (p