The results showed that the yield was significantly affected by the water applied levels. The highest value flax seed yield was obtained with treatment (B) 753.25 kg seed/fed, and 4.58 Mg straw/fed, while the lowest value was obtained with treatment (D) 656.0 kg seed/fed, and 4.0 Mg straw/fed.
1- By increasing sowing machine forward speed from 3.61 to 7.22 km/h, tends to decrease germination ratio from 88.0 to 78.0 %.Also, the longitudinal and lateral scattering values increased from (3.1 to 4.5 %) and (1.3 to 1.8 %)when the sown machine forward speed increased from 3.61 to 7.22 km/h. Also, the coefficient of uniformity increased from (91 to 95 %).
2- increasing the sowing machine forward speed from 3.61 to 7.22 km/h, tends to increase the effective field capacity from (1.50 to 2.90 fed/h), consumed power from (14.0 to 33.0 kW), energy requirements from (9.33 to 11.38 kW.h/fed), slip ratio from (2.99 to 7.50 %) and decrease field efficiency from (89.5 to 82.0 %), respectively.
3-The lowest value of amount water applied was recorded with treatment (D) 1117.01 m3/fed, while the highest value was recorded with treatment (E) 1974.16 m3/fed, the water saving was 19.25, 10.27, 6.20 and 43.42 % for treatment A,B,C, and D, respectively as compared with treatment E.
4- Also treatment (D) was recorded the highest value of crop water use efficiency was 0.67 kg/m3, while treatment (E) was recorded the lowest value was 0.49 kg/m3.
5-The highest value of actual water consumptive use was obtained with treatment (E) 1485.51 m3/fed, while the lowest value was obtained with treatment (D) 1005.9 m3/fed.