suliman, ashwag, Jepreel, H. T., Idris, T. I. M., A. Warrag, M. O. and Hussien, F. A. (2018) “Response of Periwinkle (Catharanthus roseus) to urea applications”, IJRDO-Journal of Agriculture and Research (ISSN: 2455-7668), 4(10), pp. 01-06. doi: 10.53555/ar.v4i10.2454.