{{cite journal | last1=Nazeer | first1=S. | author2=A. U. Malik | author3=G. Nazir | author4=J. Ahmad | year=2012 | title=EFFECTIVENESS OF TILLAGE SYSTEMS AND FARM MANURE LEVELS ON RICE PRODUCTIVITY | journal=Journal of Animal and Plant Sciences | volume=22 | issue=2 | pages=334-338 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2012-JAPS-216}}