Author/Authors :
faizy, s. e. a. kafr el-sheikh university - fac. of agric. - dept. of soil sci., egypt , rezk, m. m. kafr el-sheikh university - fac. of agric. - dept. of soil sci., Egypt , gazia, e. a. e. agricultural research center (a.r.c.) - soil, water and environment res. instit., Egypt , amer, m. m. a. kafr el-sheikh university - soil, water and environment res. instit., Egypt
