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Survival of Four Barley Varieties in a Mixture 1
Author(s) -
Suneson Coit A.
Publication year - 1949
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1949.00021962004100100002x
Subject(s) - citation , agriculture , division (mathematics) , agronomy , agricultural experiment station , agricultural science , library science , mathematics , geography , computer science , biology , arithmetic , archaeology
. . . . . . . . . . . . . . . . Atlas.. Club Mariout. Hero. . Vaughn.. .,. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N a previous paper3 it was shown that survival in a I mixture bore no relationship to the yields of the component varieties when comparably crown in pure stands. Further proof for this was obtained by extending the experiment from 1941 to 1948 for a total of 16 years. Practical extinction of two of the varieties resulted. Furthermore, a clear case of competitive aggression, despite severe affliction with leaf diseases, was observed. These observations have a direct application to the bullted hybrid method of breeding, and are contrary to some of our classical concepts concerning its operation.