Sows on pasture, with shade structures. A settling basin removes most of the manure solids that are washed off the lot. Effluent is diverted to cropland where the manure nutrients are utilized. In larger lots, lot runoff would be stored in a holding pond and irrigated onto cropland. Growing pigs in a flush gutter.
Water is flushed though the buildings several times each day to remove manure.
Pigs tend to dung in this channel, keeping the rest of their pen clean. In areas where fresh water is not abundant, the flushed water can be treated in lagoon before recycling. Used to collect runoff containing manure solids from an outside lot. Runoff is stored until it can be irrigated onto cropland to utilize the nutrients. Naturally ventilated grow-finish barn.