Abstract

This study was done at a research farm of the faculty of Agriculture and Marshlands of Thi-Qar University, in Silty Clay soils during the growing season 2021-2022 to study the effect of three levels of NPK fertilizer addition on the yield and some components of quinoa plant under surface irrigation and drip irrigation methods, The study was conducted according to the randomized complete block design with three replications. Mineral fertilizer was added at three levels (0%, 50%, and 100%) of the recommended dose (120, 50, and 80 kg K ha-1) of NPK sequentially. The finding indicated that the treatment with the full recommended dose of fertilizer 100% attained the most outcomes in dry substance yield and grain production of quinoa plant, at 8.84 and 2.71 megagrams hectare-1, respectively, in contrast to the treatment under control, which showed 3.11 and 0.90 megagrams hectare-1, respectively. Additionally, the drip irrigation method was associated with the best results in quinoa yield, the highest average in grain yield was reached 1.95 megagrams hectare-1, with a notable distinction of surface irrigation treatment, which showed 1.47 megagrams hectare-1.