Factors Influencing Seed-Setting in Alfalfa

J. M. Armstrong, Dominion Expiremental Farms, Ottawa, Canada
W. J. White, Dominion Expiremental Farms, Ottawa, Canada


The improvement of alfalfa with respect to seed production is one of the major projects of the Dominion Department of Agriculture. The problem is being attacked chiefly from the standpoint of genetics, but some attention is being given also to various other factors which influence seed-setting. The basis of this study is a special group of plants which produce seed abundantly and normally by self-fertilisation. These have been described by Kirk and White (1933), and their possible utility in breeding for seed production has been fully discussed by Kirk (1933).