Man reseearcher at Topeka reseearch laboratory
Manure from high-protein diet
black cow with ear tag standing in grass
An aerial photo shows the Merck manufacturing site in DeSoto.
Dairy cows feeding in barn
A close up of the toxin, ergot, in the palm of a hand
Newborn calf on green forage
how to get shoppers to choose more healthy foods
Cows grazing weedy pasture
The morning sun illuminates these cattle in a feedlot in western Iowa on a summer day.