This chapter directly supports SDG 15 (Life on Land) by demonstrating how soil microorganisms are fundamental to terrestrial ecosystem health and biodiversity conservation. The research emphasizes that preserving soil microbial diversity is essential for sustainable land management and ecosystem resilience, which aligns with SDG 15's focus on protecting and restoring terrestrial ecosystems. The chapter also connects to SDG 2 (Zero Hunger) through its emphasis on how soil microorganisms enhance nutrient availability and promote plant growth, particularly in the rhizosphere. The microbial processes in nutrient cycling, including carbon, nitrogen, and phosphorus cycles, are essential for sustainable agriculture and crop productivity. The findings underscore that maintaining soil health through microbial diversity is vital for food security.