Why This Matters Chemical fertilizers account for up to 45 percent of input costs for some crops. Engineered biofertilizers may reduce these costs and increase crop yields. Key Takeaways Engineered biofertilizers are made of microbes and other organic materials that improve nutrient supply in soil. The lack of a clear definition for biofertilizers leads to uncertainty about whether existing regulations apply. Current regulations may also not be equipped for genetically engineered microbes, which may hamper U.S. competitiveness. The Technology What is it? Biofertilizer technology
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