PAGE 
Detasseling good versus poor stalks in the seed plat 110 
Natural competition as a factor in corn improvement 112 
Selection for specific plant and ear characters — 
“High leaf area” and “low leaf area” strains 116 
Selection for plant characters of Nebraska White Prize corn.... 118 
Relation of ear type to yield of grain 119 
Comparative yields of seed from different parts of the ear 127 
Relation of seed maturity to yield of grain 128 
Effect of time of selection and preservation of seed corn upon 
yield 129 
Selection of seed ears for freedom from root-rot diseases 130 
Identification of root-rot diseases by the germinator test 130 
Relation between ear type and presence of root-rot diseases as 
indicated by the germinator test \ . . 133 
Relative yield performance of diseased and disease-free corn as 
determined by the germinator test 136 
Soil and air temperatures in the field in which yield tests were 
made (1921) 140 
Ear type selection versus selection for freedom from root-rot 
diseases 142 
Relation between the ear type of the seed planted and of the crop 
harvested 145 
Relation of stand to yield of corn 147 
Relation of uniformity of stand to yield of corn 150 
