By Jamie Martin
North Dakota farmers face widespread frost damage in cornfields. The severity depends on how low and how long temperatures dropped and the crop’s maturity. James Rogers, NDSU Extension forage crops production specialist, notes that damaged corn can still be chopped for silage if handled correctly.
Moisture content is the critical factor. “Proper moisture content at the time of ensiling is key to achieving adequate fermentation of the silage and preservation,” said Rogers. Even though frost makes plants look dry, actual moisture can remain high, risking poor fermentation if harvested too soon.
Ideal whole-plant moisture is 62%–68% for most silos. Bunker or trench silos can handle up to 75% moisture, while bag silos need 60%–70%. Corn in the milk stage averages 80% moisture and must dry before chopping, which slightly lowers yield but improves silage quality. Dough-stage corn holds about 75% moisture and may require short drying. Corn at mid- to late-dent stage should be harvested promptly.
Farmers should also watch for molds that may create harmful mycotoxins and have samples tested at the NDSU Veterinary Diagnostic Laboratory. Although nitrate levels may rise after frost, ensiling helps reduce them.
Photo Credit: gettyimages-jevtic
Categories: National