Why do we need new varieties of alfalfa? Thousands of farmers in Iowa can give us the answer. We need new varieties because we’re having too much difficulty in maintaining vigorous, productive stands of the old varieties.
Wilsie, C. P.
"Better Alfalfa Coming,"
Farm Science Reporter: Vol. 6
, Article 5.
Available at: http://lib.dr.iastate.edu/farmsciencereporter/vol6/iss3/5