inside and outside of the house, large gardens or small plants, and does not leach from the soil but rather remains and continues to slowly feed the plants and enhance the soil. Guano is also rich in bio-remediation microbes which helps to clean unnatural toxins from the soil that can prevent plant growth and cause rapid decay. Urine, from humans as well as animals, is a fertilizer: urea in urine is a nitrogen compound, and urine also contains phosphorus and potassium. Human urine typically has about 3 times as much nitrogen as potassium, and more than 20 times as much nitrogen as phosphorus. The amount of potassium in urine is variable, and depends on the amount of potassium in the person's diet. Urine is not currently allowed to be used in any commercial agricultural operations. However, there are ongoing studies that have shown that aging urine in concealed containers for 12–16 months eliminates 99% of harmful bacteria, due to increasing urea content and therefore pH. Animal by-products. When any animal is butchered, only about 40% to 60% of the live animal is converted to market product, with the remaining 40% to 60% classed as by-products. These by-products of animal slaughter, mostly inedible—blood, bone, feathers, hides, hoofs, horns, -- can be refined into agricultural fertilizers including blood meal, bone meal fish meal, and feather meal. Blood meal Bone meal Fish emulsion Fish meal Manure Wood chips/sawdust PROM Plant Processed organic fertilizers include compost, humic acid, grain meal, amino acids, and seaweed extracts. Other examples are natural enzyme-digested proteins. Decomposing crop residue (green manure) from prior years is another source of fertility. Compost provides little in the means of nutrients to plants, but it does provide soil stability through increasing organic matter. Compost does help microorganisms proliferate which in turn breaks down decaying plant material into substantial bio-available nutrients for plant to easily assimilate. Compost does not need to be fully plant-based: it is often made with a mix of carbon-rich plant waste and nitrogen-rich animal waste including human excreta as a means to remove pathogens and odor from the latter. Grain meals can be made of corn gluten, alfalfa, cottonseed, or soybean. Most supply nitrogen and potassium, but soybean meal provides nitrogen and phosphorus. When initially spread they can cause an increase in ammonia within the soil and burn seeds, it is recommended to use these after plants have developed, to