Abstract |
A study was undertaken to investigate consistent farm-to-farm differences in the concentrations of strontium-90 found in milk produced within a small milkshed in central Minnesota. Covering an 8-month period, the study included sampling of milk, hay, grain, silage, water, forage, soil, and precipitation. The data indicate that 70 to 90 percent of the cattle's strontium-90 intake came from the native grass hay and that the farm-to-farm differences of strontium-90 concentrations in milk correspond to similar differences of strontium-90 concentrations in the hay fed. On the basis of the data obtained, it is not possible to explain why the consistent differences in the native grass hay existed. (Author) |