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