Field experiment was conducted at Sakha Agricultural Res. Station to study the effect of zinc application (2, 4 and 6 kg fed^-1) under different amounts of irrigation water (3317.6, 2792.6, and 2267.6 m³ fed^-1).           The obtained results could be summarized as follows:    ·       Root yield and sugar yield (ton fed^-1) were significantly increased as irrigation amounts and zinc application rates  were increased.    ·       Sucrose percentage, impurities (Na, K, aN) in the roots decreased and purity increased with increasing irrigation water amounts, while the application rate of zinc had no significant effect on these characteristics up to 4 kg Zn fed^-1.    ·       Root diameter was increased significantly as water amount increased and not affected by application of Zn.    ·       Root length was increased significantly as water amount decreased and zinc fertilization level increased.    ·       Root yield, sugar yield, root diameter, sucrose percentage , root length as well as the purity were significantly affected by the interaction between studied treatments irrigation regime and zinc fertilization. The highest values of 44.72, 8.8 ton fed^-1 and 12.31 cm root and sugar yields and root diameter, respectively  were obtained by treatment (I₁ x Zn₃) while the highest values (20.86%, 43.73 cm and 85.13%) for sucrose %, root length, and purity were recorded by treatments (I₃ x Zn₂), (I₃ x Zn₁) and (I₁ x Zn₂), respectively.    ·       The values of water consumptive use and the moisture uptake from the surface layer were increased with increasing the amount of water applied to the soil and vice versa.    ·       The values of seasonal KC were 0.82, 0.75, and 0.68 (using modified Penman equation) for treatments I₁, I₂, and I₃, respectively while its values were 0.87, 0.79 and 0.72 (using Radiation equation) for treatment I₁, I₂, I₃, respectively. Using Modified Blaney equation the KC values were 1.3, 1.19 and 1.08 from treatments I₁, I₂ and I₃, respectively.    ·       Water utilization efficiency (W.Ut.E.) for root yield was calculated to be 12.78, 13.79 and 10.10 kg/m³ for treatments I₁, I₂ and I₃, respectively while they were found to be 2.52, 2.72 and 2.07 kg/m³ for sugar yield, respectively.    ·       The values of W.U.E. were 17.53, 17.36 and 11.40 kg/m³ for root yield and 3.45, 3.43 and 2.34 kg /m² for sugar yield, with using treatments of I₁, I₂ and I₃, respectively.    ·       Treatment I₃ recorded the highest value of water application efficiency (88.55%). While the lowest value (72.89%) was recorded with I₁ treatment.