The Effect of Surface and Subsurface Drip Irrigation on Quantity and Quality Potato

To study the effect of 3 depth of placement of drip irrigation tape on yield and quality of potato (cultivar Agria)، an experiment was conducted in a randomized complete block design، in Fariman region (2010- 2011). Treatments was include، 0، 10 and 20 centimeter، installation depth of drip irrigation tape. The results showed that the yield of potato strips installed on the soil surface were more than installed at depths of 10 and 20 cm and had significant difference at 5% level. But there were not significant differences between the strips that installed at 10 and 20 cm depth. The effect of tape drip irrigation installation depth on the marketability tubers was not significant، but the number of marketability tubers was reduced from 0 to 2 and 3 depth respectively. The effect of depth of drip irrigation tape installed on the mean tubers weight was not significant. The water use efficiency of surface Tape drip irrigation had significant different with subsurface drip irrigation treatments and was more than them. Generally، surface drip tape irrigation was better than subsurface drip tape irrigation.