hi ,has anybody ever added acid casein(extracted by me from milk) to the soil as a source of organic N and L-aminos?'it's one of the best source of protein available but needs to be "digested" to be useful for the plant and th ph is 4.5.I'm trying to brew it with compost and soil to break the protein into more plant-available aminoacids.I know the enzyme protease is used to hydrolise acid casein but i can't find it.