Under most conditions, one acre of residue, from a corn field that has been combined, can provide 30 to 45 days of grazing for a 1200-lb pregnant cow; however, this can be quite variable.
Utilizing strip-grazing can extend grazing time and make the quality of the diet more uniform over the grazing period. By limiting access to only a small portion of the field, the cattle are forced to consume residual corn and both the high- and low-quality forage components of the residue. Generally, a single strand of electric fence is sufficient to control grazing. Strip grazing can significantly increase labor and if the weather turns bad some of the better feed may get covered with snow and become unaccessible to cattle.
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