te..!!here is your answer...1. Soil StructureBecause of the ORGANIC matter present in organic fertilizer, soil structure is improved and as a result the soil’s ability to hold onto water and nutrients increases.2. Microbes ThriveSynthetic fertilizer consists of chemical molecules without carbon. These molecules can sometimes be disruptive and are not accessible to microbes. On the other hand, organic fertilizer is rich in organic matter, which helps microbes thrive. Organic fertilizer contains carbon as part of its chemical makeup; and it is the carbon, along with nitrogen, phosphorus and potassium that feeds microbes and enables them to make nutrients available for plants in a naturally occurring biological process.3. Sustainable and Environmentally FriendlySynthetic fertilizers runoff into our waterways harming marine life and water quality. Organic fertilizers do not run off as easily (if at all) and are associated with soil structure. According to the Organic TRADE Association, organic fertilizer also increases species biodiversity by 30% COMPARED with synthetic fertilizer.hope these points help you..