In recent years, increasing the irrigation water use efficiency has been considered by researchers through precision irrigation. Water use efficiency can be increased by improving irrigation planning, including the time and amount of applied water during the growing season.The purpose of irrigation planning is to maximize the effective use of water and energy by applying the exact amount at the require time for the plants and ensuring that the water is available at the time required by the plant. The purposes of this study was to investigate the effects of irrigation tapes with different flow rate and different planting patterns on yield, water use efficiency and nitrate leaching. The experiment was performed as a strip plots in completely randomized design with three replications. The main treatment was different planting patterns, including planting on ridgess with 75 cm wide (P1), planting two rows with a spacing of 50 cm along with an irrigation tape between them on ridges of 150 cm wide (P2), planting two rows with a spacing of 70 cm with an irrigation tape at a distance of 15 cm for each row on the ridges of 150 cm wide (P3).The sub-treatment of the test was irrigation tape with a flow rate of 2.24 liters per hour (T1) and irrigation tape with a flow rate of 1.3 liters per hour (T2) with a discharge spacer of 20 cm in both tapes. At the end of the growing season, the yield of treatments, water use efficiency, irrigation water use efficiency and nitrate leaching from the root zone in different treatments were measured. The results showed that the P2T1 treatment had the highest yield (36.38 ton / ha) and P1T2 treatment had the lowest yield of 21.55 ton / ha.The P2T1 treatment had the highest amount of water use efficiency equal to 11.848 kg/m3. Also, by considering the irrigation water use efficiency of each treatment, P2T1 treatment with 71.1 g/mm depth of irrigation and P1T2 treatment with 42.1 g/mm depth of irrigation had the highest and lowest amount respectively. By measuring the amount of water inside the tubers relative to their dry weight, the parameter of the relative water content of the plant was defined. The results showed that the highest and lowest relative water content of plant reached in the P2T2 and P3T1 treatments with amounts eqaul to 3.78 and 3.51 gram water per gram tuber respectively Also, by measuring the nitrate concentration in the soil, before planting and after harvesting and concentration of the remaining nitrate in the potato tuber and calculating the balance, the nitrate leaching from the root zone was calculated.P2T1 and P1T1 treatments with 0.49 and 0.3 mg / g potato tubers had the highest and lowest amount of nitrates remaining in potato tubers. Also, the P3T2 treatment had the highest amount of leached nitrate from the root zone (1029 mg) and the P1T2 treatment had the highest amount of nitrate added to the root zone (4394 mg). Keywords: Potato, Different planting patterns, T-Tape irrigation, Nitrate leaching, Distribution of moisture in the soil.