Dr. Rick Rasby, University of Nebraska 11,000 gallons of water a year 11,000 gallons of water a year 11,000 gallons of water a year 11,000 gallons of water a year three to 30 gallons of water a day Dr. Rick Rasby, University of Nebraska 11,000 gallons of water a year rule of thumb access to more water 11,000 gallons of water a year 11,000 gallons of water a year 牛1頭あたり年間およそ4万1,600リットル beef.unl.edu/amountwatercowsdrink https://beef.unl.edu/amountwatercowsdrink 11,000 gallons of water a year 11,000 gallons a year per cow 11,000 gallons of water a year