Response of popcorn (Zea mays ssp.everta L.) to urea and sulfur fertilizer as well as foliar urea application Journal title: Annals of West University of Timisoara, ser. Biology Authors: Ali Husain JASIM, Muna Muhammad GHANEE Subject(s): Plant Sciences, Ecology, Biology, Education & Educational Research, Environmental Studies, Agriculture, Multidisciplinary, Biochemistry & Molecular Biology, Zoology, Biodiversity Conservation, Developmental Biology, Meteorology & Atmospheric Sciences