Dairy Farm in northern China (IMAGE) Rothamsted Research Caption Each cow produces around 30kg of milk per day at this medium-sized (650 head) dairy farm in Hebei province, northern China. Credit Wang Xuan Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.