The transition period is often defined as the interval beginning three weeks precalving and ending three weeks postcalving. It is a period where the dairy cow undergoes tremendous metabolic physiological and nutritional changes to ensure provision of adequate nutrients... Lees meer.
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In the late 1990s and early 2000s imports of milk protein concentrate had brought the U.S. agricultural programs to a crisis. The USDA was rapidly accumulating stocks of nonfat dry milk and unable to maintain the support prices to which it was committed the cornerstone... Lees meer.