Some producers apparently made their spring hay field winter injury assessment from afar because now they are finding that their hay fields are coming up short on stand density and hay yields. The factor most common to these winter damaged fields is that they are three years or older in age. By the plants per square foot method, alfalfa stands of this age with less than four plants per square foot are considered to have yield limitation due to low stand density.
Iowa State University
Barnhart, Stephen K., "Some Producers are Now Discovering Winter-Injured Hay Fields" (2009). Integrated Crop Management News. 624.
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