<![CDATA[Horticultural crops have become leading vegetable crops in the agricultural sector today. Their products, which are widely demanded and consumed by the public, also contain nutrients that are beneficial to health. One type of vegetable cultivated by some communities is bok choy (Brassica rapa L.). This study aims to determine whether the application of Trichoderma sp and Pseudomonas fluorescens affects the growth of bok choy, and whether differences in the concentrations of these two bioagents influence the yield of bok choy. The experiment was laid out in a Randomized Block Design (RBD) with seven treatment levels consisting of two types of bioagents Trichoderma sp and Pseudomonas fluorescens each applied at three concentration levels (10 mL/L, 20 mL/L, and 30 mL/L). The seven treatments were: control (no bioagent), Trichoderma sp at 10 mL/L, 20 mL/L, and 30 mL/L, and P. fluorescens at 10 mL/L, 20 mL/L, and 30 mL/L. Each treatment was replicated three times, with five plants per replicate, for a total of 105 plants. Observations began with a soil analysis; thereafter, measurements were taken weekly after planting and again at harvest. The variables recorded included plant height, number of leaves, leaf area per plant, fresh weight of the whole plant, fresh weight of shoots, fresh weight of roots, dry weight of the whole plant, dry weight of shoots, dry weight of roots, plant weight ratios, root ratio, and shoot-to-root ratio. The application of Trichoderma sp and Pseudomonas fluorescens was found to influence bok choy growth. These microorganisms act as biological agents that enhance plant health through mechanisms such as pathogen suppression, improved nutrient availability, and growth stimulation. Moreover, varying the concentration of these bioagents will affect the production yield of bok choy.]]>
