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