Panchgavya for farmers consists of five products from the cow: dung, urine, milk, curd and ghee. These, which when mixed appropriately, have excellent, almost miraculous, results. Dr. Natarajan has added some more ingredients. A recent book I have picked up, from the The Other India Bookshop, is a manual on Panchgavya by Dr. K. Natarajan. Dr. Natarajan has studied the effects of panchgavya for decades and has used it across India to treat plants, animals and human beings. He says that the basic preparation should be fine tuned for maximum efficiency.