Effects of humic acid and irrigation on some yield components of maize KSC 704 in ZabolRrgion

In order to investigate the effect of humic acid and irrigation interval on yield and yield components of corn seed of Single Crusher 704 cultivar in Zabol, a split plot experiment (split plot) in a randomized complete block design with 3 replications. Experimental treatments include main plots three levels: 6 days (A1), 9 days (A2) and 12 days (A3), and and sub plots of research include humic acid in four levels including control or weekly (B1) Biweekly (B2), Triweekly (B3) and Monthly (B4). The results of analysis of variance showed that the effects of irrigation and spraying of humic acid on their harvest index, plant height, number of ear per plant and number of seeds per ear were significant. The highest Harvest index (51.42%), plant height (190 cm), number of ear per plant (3.6 N.o) and number of grain per ear (612 N.o) were obtained irrigated conditions for 6 days and Biweekly Humic acid spray treatment. According to the results of the experiment, the best irrigation interval for corn seed is recommended for 6 days irrigation, with the use of Biweekly for humic acid solution for cultivation in the area.