Document Type : Original Article
Authors
1 Dept. of Agric. Economic, Fac. of Agric., Sohag, South Valley Univ.
2 Dept. of Agric. Economic, Fac. of Agric., Ein Shams Univ.
3 Dept. of Agric. Extension, Fac. of Agric., EI Azhar Univ., Assuit
Abstract