1. P. K. Khan:
Agricultural Extension, Rawalpindi, Pakistan
2. M. Musa:
Barani Agricultural Research Institute (BARI), Chakwal, Pakistan
3. M. A. Shahzad:
Barani Agricultural Research Institute (BARI), Chakwal, Pakistan
4. N. K. Aadal:
Barani Agricultural Research Institute (BARI), Chakwal, Pakistan
5. M. Nasim:
Soil Fertility, AARI, Faisalabad, Pakistan