628 
Journal of Agricultural Research 
Vol. XXIII, No. 8 
CONCLUSIONS 
1. Early vigor and yield of the corn plant are closely correlated. 
2. Variations in early vigor are due, not simply to chance, but to certain 
factors, genetic, physiologic, and pathologic, which are more or less under 
the control of the investigator, the com breeder, and the corn grower. 
3. The importance of the disease factor demands that it be given a 
prominent place in any program which aims at the permanent improve¬ 
ment of the com crop. 
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(10) — 
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(16) Holbert, J. R., Dickson, James G., and Biggar, H. Howard. 
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(in text), 4 col. maps. 
