{{cite journal | last1=Niamatullah | first1=M. | author2=M. Sadiq | author3=C. S Hayat H. Farid | author4=M. Mumtaz | year=2011 | title=EFFECTS OF PHOSPHORUS APPLICATION ON PLANT POPULATION, NUMBER OF LEAVES AND YIELD OF GREEN FODDER MAIZE IN D. I. KHAN, PAKISTAN | journal=Journal of Animal and Plant Sciences | volume=21 | issue=1 | pages=94-96 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-106}}