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.
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| Type | Size | Price (USD) Standard License |
Price (USD) Premium License |
|---|---|---|---|
| HD Master, Broadcast-ready (1920x1080, unmarked) | 1358 MB | $190.00 | $240.00 |
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