Current Trends in Natural Sciences Vol. 10, Issue 19, pp. 252-259, 2021 https://doi.org/10.47068/ctns.2021.v10i19.033 Current Trends in Natural Sciences (on-line) Current Trends in Natural Sciences (CD-Rom) ISSN: 2284-953X ISSN: 2284-9521 ISSN-L: 2284-9521 ISSN-L: 2284-9521 http://www.natsci.upit.ro *Corresponding author, E-mail address: cengizy@ksu.edu.tr 252 EFFECTS OF NITROGEN AND ZINC TREATMENTS AT DIFFERENT DOSES ON MAIZE YIELD AND YIELD COMPONENTS UNDER KAHRAMANMARAŞ CONDITIONS Cengiz Yururdurmaz 1,* , Ali Turan 1 1 KSU Faculty of Agriculture Department of Field Crop Kahramanmaraş, Turkey Abstract This study was carried out in 2019 in Kahramanmaraş University Field Crops Department to determine nitrogen and zinc fertilizer needs of maize plants in Kahramanmaraş Region. Experiments were conducted in split-plots design with 3 replications. Soil nitrogenous fertilizer (Urea) treatments were arranged as: 0 kg/da (N0), 15 kg/da (N15), 30 kg/da (N30). Foliar zinc treatments were arranged as 0 ppm (Zn0), 2500 ppm (Zn5), 5000 ppm (Zn10). Dekalp DKC6890 hybrid maize variety was used as the plant material of the experiments. Present findings revealed that nitrogen and zinc treatments had significant effects on the first cob height, cob length, cob thickness, number of rows per cob, number of kernels per cob and kernel yield of maize plants, but the effects of nitrogen and zinc treatments on plant height and thousand kernel weight were not found to be significant. Keywords: Maize, Nitrogen level, Zinc level, Yield, Yield components 1. INTRODUCTION Maize (Zea mays L.), belonging to the family of Gramineae, is a foreign-pollinating, warm -season cereal adapted to different climates. It constitutes an important source income for farmers worldwide (Shaw, 1988). With increasing populations, maize have become a popular cereal both in the world and Turkey. Maize is used in both human nutrition and animal feeding. It is also used in various sectors of the industry. Just because of high unit area yields and silage yields, it is a popular crop of the farmers and because of kernel starch, sugar and oil contents, it is a highly popular crop among industry specialists. A fully-ripened maize kernel contains 70% starch, 10% protein, 2% sugar and 2% ash (Kün, 1994). In recent years, potential use of maize in biodiesel production have increased the demands for maize crop. After wheat and paddy, maize has the third largest cultivation area (185.121.342 ha), but has the greatest unit area yield (933 kg\da) among the cereals (Anonymous, 2019a). In Turkey, maize consumptions have increased with increasing populations and the annual consumption per capita reached to 57 kg (Şehirali et al., 2000). Worldwide, maize is mostly cultivated in American Continent. The USA is the leading maize producer and meets about 40-45% of world production (Babaoğlu, 2005). Following the USA, China, Azerbaijan, Brazil and Mexico are the other large maize producers of the world.