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  • Is Your Hay Too Hot? | Purdue University Pest Crop newsletter
    Moldy hay caused by microorganisms because hay was made at too high a moisture content (Photo Credit: Brooke Stefancik, Purdue ANR Educator-Sullivan County) It is quite normal for a temperature rise to occur after hay is packaged, but anything greater than 125 degrees F should be intently monitored
  • What Happens If Hay Bales Get Too Wet? - Biology Insights
    Owners should monitor the internal temperature using a dedicated hay probe or by inserting a metal rod deep into the stack If the rod is too hot to comfortably hold after ten minutes, or if the temperature reaches 150°F, the hay is in the danger zone and must be monitored multiple times daily
  • Understanding and Reducing Mold Growth in Hay - Team Forage
    Although bale temperatures usually decrease after two weeks, in moist hay they can reach over 150 degrees, causing excessive heat damage and even the risk of fire It is important to remember that while moldy hay and heat damaged hay often go together, fungi alone cause little heat damage
  • Monitor moisture content at baling | Hay and Forage Magazine
    Rogers notes this is true regardless of bale size, but heating tends to be more intense in larger, denser bales For example, if a small square bale and a round bale with a 5-foot diameter are both baled at 20%, the round bale will have a higher peak internal temperature Lost protein One implication of heat-damaged hay is lower crude protein
  • MANAGING MOLDY HAY LESSENS FEEDING DANGERS
    Mold vs Heat-damaged Hay Hay baled when slightly wet can either form mold, go through a heat-ing process, or both Heat damage has different implications for hay quality than mold When the internal temperature of a bale stays in the 125 to 150 F range, mold spoilage typically results Heat damage, also known as the Maillard reaction, oc-curs if the bale temperature exceeds 150 degrees
  • How to Inspect Hay Bales for Internal Mold Before Selling or Buying
    Internal mold is one of the most serious — and least visible — problems in hay marketing A bale can look perfectly fine on the outside while harboring mold deep inside, creating health risks for livestock and financial losses for producers Knowing how to inspect hay bales properly protects both buyers and sellers
  • Moisture increase after baling - what’s normal? | Hay Forage Forum
    Slight temp rise wouldn't worry me either Since you are new to moisture meters, be aware that hand held meters will show heating after repeated probing simply from the friction of the hay acting on the tip of the probe If my brother is monitoring internal bale temp he stabs the tester in a bale and leaves it there
  • Cow-calf Corner: The importance of hay moisture - Texas and . . .
    If hay must be baled during unfavorable conditions a hay thermometer (36-inch compost thermometer) is a useful tool for measuring hay bale temperature If hay reaches an internal temperature of approximately 135ᵒF, it is recommended to remove it from the barn
  • Hay Storage: Dry Matter Losses and Quality Changes
    Hay baled with moisture contents greater than 20 percent can develop mold and lose dry matter and quality to bacterial degradation In rare cases, hay baled at a high moisture content can spontaneously heat or combust Moldy hay can be detrimental to livestock health The extent and duration of temperature rise in hay depends on moisture content
  • Hay Storage Tips Avoid to Heat and Moisture - AgWeb
    Safe Storage Temperature for Hay Bales Safe storage temperatures are less than 120 degrees, above this excessive molding and heating occur, fire danger begins at an internal temperature of 170





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