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Don't Forget to Test Hay for Nutritional Value

By Darrin Pack
 
Wet weather this spring has delayed the hay harvest throughout the Midwest, raising concerns about feed quality and safe storage.
 
Keith Johnson, professor of agronomy and Purdue Extension forage specialist, said forage becomes less digestible and palatable for livestock the longer it stays in the field.
 
“As soon as a window does allow for harvest, it will be especially important for growers to get a nutrition test on harvested forage,” Johnson said. “They may find out it’s of inferior quality but they might also find out it’s in the acceptable range. Having hay analyzed puts farmers in a position to use best management practices and provides buyers with analytical data in addition to visual information.”
 
Forage quality and nutritional value are determined by a number of factors, Johnson said, including maturity stage at harvest, species and variety, leafiness, and the absence of foreign objects, weeds and pests. Storage conditions are also important, Johnson said.
 
“Storing hay with a moisture content of more than 20 percent without using a preservative could allow the growth of bacteria that release heat and cause mold formation,” he said. “This process increases the inner temperature of the bales, sometimes high enough to cause spontaneous combustion.”
 
Johnson said it could take three to four weeks for temperatures to reach critical levels. He advised farmers to check stored hay regularly for warning signs of moisture or heating
 
 
 
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