Abstract—This study aims to analyze the effect of Trichoderma asperellum utilization on the level of water availability and nutrient in soybean.. This study was conducted by inoculating of Trichoderma with four dosage levels (without inoculation, 0.025 gram / seed inoculation, 0.050 gram / seed, and 0.075 gram / seed) combined with water level capability with three levels of field capacity (80-100%, 60-80 %, and 40-60%). The results showed that Trichoderma with a dose of 0.075 g / seed with a water level of 80-100% can improve the growth and production of soybean crops.