Higher Economic Returns from Manure than Chemical Fertilizer

Higher Economic Returns from Manure than Chemical Fertilizer
http://www.beyondpesticides.org/dailynewsblog/?p=3824

"A recent study by Seong Park, Ph.D., published in the Agronomy Journal, demonstrates that manure generates higher economic returns than anhydrous ammonia, a synthetic fertilizer. Dr. Park, a research economist with Texas AgriLife Extension Service found no significant difference in yield between organic and chemical nutrient sources."