In general, a 200lb pig would produce about 13lb manure per day. Pig manure contains plentiful essential nutrition ingredients like nitrogen, phosphorus and potassium for plant growth, which can promote healthy growth and increase the yield of grain crop. Even though pig manure is a commendable raw material of organic fertilizer, lots of pig manures carry E.coli, salmonella, parasitic worms and a host of other organisms, so it is necessary to compost pig manure before using them as fertilizer into soil directly. If you own a pig, you've got to deal with managing the manure. If you own a pig farm, you need to consider how to process the manure with more efficient and economic methods. Luckily, pig farmers can choose the related composting machine and organic fertilizer equipment to make manure biological organic fertilizer. In the case of composting, it's safe to use this manure as a soil amendment.