Biofertilizers are natural substances that contain living microorganisms, which help enhance soil fertility and plant growth. They work by fixing nitrogen, decomposing organic matter, and promoting nutrient availability in the soil. Common types of biofertilizers include rhizobium, mycorrhiza, and azospirillum, each playing a unique role in supporting plant health. Using biofertilizers can reduce the need for chemical fertilizers, making agriculture more sustainable. They improve soil structure, increase microbial activity, and can lead to higher crop yields. By promoting a healthier ecosystem, biofertilizers contribute to environmentally friendly farming practices.