Nutrient inputs can be chemical inorganic fertilizers, manure, green manure, compost and minerals. These worms thrive in rotting vegetation, compost, and manure. They can also be collected from compost and manure piles. Animal waste including poultry litter, dairy manure, and potentially other manures are also under evaluation. Methane biogas derived from cow manure is being tested in the U.S. Soil organic content was historically boosted via application of some of manure per hectare. Substances such as urine, excrement, liquid manure, and sullage were used for this purpose. The company has developed a technique of mixing sawdust with chicken manure to produce topsoil. Besides the organic fertilisers in manure, new fertilisers were slowly discovered. Groundnut cake is being used as manure and cattle feed. Strategies include using biogas from manure. Such pigs consume less feed to reach finishing weight and produce less manure. They also regulate slurry and manure storage. The eggs are laid among putrefying organic materials such as hay, manure, and wood. They pluck maggots from carcasses and manure.