Abstract
This study was conducted to evaluate the surface and subsurface drip irrigation (SDI) application
 effects on sugar beet crop performance, under two levels (100% and 80%) of water application depth.
 The experimental design was a split plot with four replications. Laterals were set every second crop row
 (1 m apart), with emitters spaced 1 m apart. In the case of SDI, laterals were buried 0.45 m under the
 ground. Soil moisture measurements were taken up to 75 cm depth, using the TDR method. The soil
 water content and the yield characteristics of each treatment were recorded. Irrigation method showed
 to affect crop performance significantly while water application level was less critical. The experimental
 results indicated that the subsurface drip irrigation leaded to a greater yield and higher sugar content
 making significant water saving compared to surface drip irrigation.
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