Author/Authors :
abd el-rahman, m. f. s. agric. res. center - field crops res. inst. - barley res. dept., Egypt , khalil, f. a. f. agric. res. center - soil, water, and environment res. inst. - water requirements and field irrigation res. dept., Egypt , anton, n. a. agric. res.center - field crops res. inst. - crop physiology res. dept., Egypt
