PREDICTION OF ONION BULB YIELD UNDER WEED PRESSURE IN ONION / RICE CROPPING PATTERN OF THE LOWER SWAT VALLEY N W PAKISTAN GUL HASSAN SAIMA HASHIM Khan Bahadar Marwat Marwat DOI: https://doi.org/10.28941/pjwsr.v9i1%20and%202.103 PDF Published 2003-03-01 Issue Year 2003, Volume 9 , Issue 1 and 2 Section Articles