yellow (or burn) my hybrid bermuda (Tif-419) by applying this product: http://erthproducts.com/products/erth_food.html#erthfood I applied roughly 2 cubic yards of material to approximately 3,500 sq. ft of bermuda. It did not burn all of the leaf tissue, but did burn the top 1/3 of the blade though. I did not recognize that I needed to be super careful with an "organic" (as claimed on the website) product. Oh well...lesson learned. I guess you can actually burn with an organic product. Does it make sense that I burned my turf with this stuff applied at this rate?