Good earth, 4 lb, 100% natural food grade diatomaceous earth, an effective anticaking agent & post harvest moisture control aid for dry pet food kernels & stored grains such as barley, buckwheat, corn, oats, rice, rye, sorghum, milo, sunflower or other bird food blends, for protecting grains or seed from moisture damage depends on lightly coating the outside surface of substantially all kernels with this powder, most effective protection will be achieved if grain or seed is treated immediately after harvest, certified organic by omri.