I have a lawn care company that offers both synthetic and organics. I would like to go to all organics but I am confused why synthetic fertilizers are supposedly so bad for the soil. I went to Rutgers and have a degree in turf management and we were never taught that theory. I understand how organics work but it seems silly not to use synthetic fertilizers. I know that you need to add organic materials in turf programs and that you have to feed the microorganisms through compost teas and topdressings. The thing I dont understand is why you all say that synthetic fertilizers destroy the soil and microorganisms. I know that phosphurus can be bad for waterways. Im talking about Nitrogen. I even went back to some literature by Nick Christians about fertility and I quote from his book "Like natural organic fertilizers, the carbon in urea and methyleneurea is a source of energy for microorganisms in the soil" It seems that this contradicts the belief that synthetics are bad for microorganisms and the soil. Im not saying that your wrong but Nick Christians is one of the most intelligent and respected turf professors in the world. I know pesticides are bad but why are synthetic fertilizers so bad and if I reallly need to eliminate them for an organic program?