This note shows comparable yields for 22 out of 100 alfalfa varieties which have been tested in at least three trials at Lexington or Princeton since 1971. Varieties not listed include many taken off the market, varieties known to be unsuited to Kentucky, or those which need further testing.
Yield results from seven separate trials are given in Table 1 as average annual dry matter yields (T/A) and as % relative yield (RY) as compared to Vernal. Vernal was used in each trial as a standard check and on the soils of limestone origin at Lexington and Princeton averaged over 5 tons dry matter per acre, per year. Tests were harvested as for hay a minimum of 4 years and in some cases 6 years. As can be seen by the yields reported, several varieties have consistently outyielded Vernal.
Sigafus, Roy E., "Summary of Alfalfa Variety Trials in Kentucky (1971-1983)" (1984). Agronomy Notes. 103.