Letter U

Uniformity: The degree to which animals in a population are similar in size. High uniformity is desirable for marketing.

Urea: A source of nitrogen (fertilizer) or, in some cases, used as a carbon source in BFT (though less common than molasses).

UV (Ultraviolet) Sterilization: A water treatment method that uses UV light to kill or inactivate microorganisms (bacteria, viruses, fungi).