In the United States, the majority of poultry houses are constructed on top of a dirt pad. Many growers notice that their performance begins to slip as more and more flocks are raised in a house even though the houses are still well managed. Growers also observe that no matter how thoroughly they clean and disinfect a house after a disease outbreak, the disease challenges tend to linger on.
Why do lingering issues exist? The dirt pad in a poultry house will absorb ammonia, increasing pad pH to 8-10. This high pH is very favorable . . .
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