the effects of sub-soiling and different levels of irrigation on sugar beet and wheat yield in rotation

in order to evaluate the effects of sub soiling and irrigation level treatments on yield of sugar beet and wheat in rotation, an experiment was conducted at agricultural research station ofwest azerbaijanprovince. the plots were arranged as a strip plot experiment in randomized complete block design with three replications. horizontal plot (sub soiling treatment) consisted of sub soiling depth of 45 cm and no-sub soiling, and vertical plot (irrigation level treatment) included 100, 80 and 60 percents of full irrigation. the yield of wheat and sugar beet was evaluated for three years (1379- 1380). the results showed that after 3 years, sub-soiling had no- significant effect on yield of sugar beet and wheat, but the effects of first year sub-soiling on wheat yield and first and second year sub-soiling on sugar beet yield were significant. the irrigation treatments influence on yields of wheat and sugar beet were significant (α=0.01). the sub soiling improved water productivity, general and made it possible to apply deficit irrigation without yield reduction.