A cold surface, such as a glass of ice water, can cool surrounding warm moist air until it no longer can hold the water vapor it is carrying. The result is condensation on the cold surface, or ice if the surface is cold enough. Grow-finish pigs with a round feeder on partly slotted floor. Cartoon showing pig enjoying the good life.
Ration is high-moisture corn.
These building are designed and oriented to maximize penetration of solar energy during winter by taking advantage of the fact that the winter sun is low in the southern sky. 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.