Four particular bread wheat assortments were included within the display to examine their yield and the physiological and biochemical properties underneath the effects of different organic and inorganic fertilization as well as biostimulator applications. The study was conducted at the Field Crop Research Center-Sulaimani \ KRG - IRAQ. In addition to mineral fertilizer, farmyard manure, poultry manure, and biofertilizer were utilized in a field experiment. The treatments were repeated in another field experiment with a biostimulator application. The biostimulator application in three diverse development stages of the studied wheat varieties was arranged to diminish the insufficiency coming about from the impact of organic fertilizers compared to the impact of synthesized fertilizer. The criteria related to the yield and yield components and some physiological and biochemical properties (Soluble Sugar, Phenols, Flavonoids, and Carotenoids Content) of wheat grains were assessed. The influence of organic sources increased the flag leaf area and chlorophyll content, although it declined with growth advantages. The impact of farmyard manure exceeded significantly other nutrient sources in the number of spikes m- 2, Spike Partitioning Coefficient %, 1000-grain weight, and total grain yield displaying (253.542 spikes m-2, 40.429%, 36.89 g, and 2122.9 kg ha-1). Significant differences were found in Phytobiochemicals among the effects of nutrition sources and the biostimulator. The outcomes of soil analysis revealed a few enhancements, such as the decline in soil pH as well as an increase in soil organic matter due to organic fertilization and biostimulant application.
