By Jerad Jaborek
Limit-feeding corn grain can be economically advantageous when the price of hay becomes too high due to short supply.
During the winter when pastures are no longer a viable feed option, hay becomes the most common feedstuff fed to beef cows. Additionally, during drought conditions, pasture no longer exists as a viable feed option and cattle producers resort to feeding hay. Unfortunately, drought conditions can also make it very difficult to grow and harvest enough hay needed to feed the cow herd when pasture is unavailable.
Source : osu.edu