Milk distribution and feeding practice data for the pathway model

1990 
Milk is a major source for ingestion of several radionuclides, particularly when it is produced from fresh forage. Estimation of radionuclide ingestion via milk from Nevada Test Site fallout events in the 1950s required information on the sources of milk, feeding practices for cows, and elapsed time between milking and consumption for various geographic areas. These data were essential input to the food-chain model, PATHWAY. A data base was compiled from personal interviews. Milk sources included private cows, local dairies, and regional plants that collected from and distributed to wide geographic areas. Estimates of the contribution of each source were made for communities in a nine-state area. Pasture seasons varied from 3 to 6 mo. Pasture use varied from zero to 80% of the cows' diet. Pasture use declined during the 1950s, as did the number of family cows and local dairy plants. Regional distributors captured a larger portion of the market, and improved technologies increased the shelf life of milk. These factors tended to reduce the human intake of fallout radionuclides from milk in the latter part of the 1950s.
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