EFFECTS OF TILLAGE PRACTICES AND SOWING METHODS ON WEEDS AND BIOLOGICAL YIELD OF WHEAT UNDER SEMI ARID ENVIRONMENT MOHAMMAD JAMAL KHAN KHAN Muhammad Amin MUHAMMAD TARIQ JAN JAN DOI: https://doi.org/10.28941/pjwsr.v19i1.491 PDF Published 2013-03-01 Issue Year 2013, Volume 19 , Issue 1 Section Articles