+"College Park Maryland USA" +1957 stock footage and images

Professors test nutrition value of different types of feed on milk production of cows in experimental dairy farm

Professor with a cow at University of Maryland experimental dairy farm in College Park, Maryland. Calves eating. A cow is injected with small dose of radioactive isotope to trace efficiency of feed conversion into milk. A professor takes milk sample from the cow. The milk is analyzed in a laboratory. Various laboratory instruments and Professors working with them.