It takes the average cow three to five minutes to give her milk. This method of milk cooling was extremely popular before the arrival of electricity and refrigeration. For this reason, many farmers will cull slow milking cows.[citation needed] Many dairy farms also grow their own feed, typically including corn, alfalfa, and hay. The water is usually not just dumped back into the ground again, but reused for washing and other purposes. This is fed directly to the cows, or is stored as silage for use during the winter season. The naturally cold underground water would be continuously pumped into a tub or other containers of milk set in the tub to cool after milking.

U Shape Shower Curtain Rod Keeping milk cool helps preserve it. A pulsating flow of ambient air and vacuum is applied to the inflation s air chamber during the milking process. This problem was resolved through the development of the ice bank.Dairy farming is a class of agricultural, or an animal husbandry, enterprise, for long term production of milk, usually from dairy cows but also from goats and sheep, which may be either processed on site or transported to a dairy factory for processing and eventual retail sale. When windmills and well pumps were invented, one of its first uses on the farm besides providing water for animals was for cooling milk, to extend the storage life before being transported to the town market. When the milking operation starts only the milk agitator and the water circulation pump blowing water across the ice and the steel walls of the tank are needed to rapidly reduce the incoming milk to a temperature below 40 degrees. Slow milking cows may take up to fifteen minutes to let down all their milk.