This bulletin states two general things: First, some elementary definitions of hybridity and the conditions of hybrid vigor; Second, at Brookings and Beresford it is possible that hybrid corn produced 2.8 bushels per acre higher than mass selected corn.
hybird corn yields, hybird corn adoption, mule corn
South Dakota Experiment Station, South Dakota State College of Agriculture and Mechanical Arts
Hume, A.N. and Franzke, C.J., "Hybrid Corn" (1936). Research Bulletins of the South Dakota Agricultural Experiment Station (1887-2011). 299.