CONTENTS 



Page. 



Introduction 7 



Tests in Maryland 9 



Work of 1909 9 



Clioice of varieties 9 



Crossing the varieties 11 



Growing pure-bred seed for comparison 11 



Work of 1910 11 



Location of tests 11 



Order of planting the test'rowff. 11 



Equality of conditions for growth and productiveness 12 



Presentation of results in Maryland 12 



Field records in detail 12 



Comparative productiveness of seed of 1908 and 1909 15 



Crosses compared in productiveness with the male parent 16 



Combined results of the four Maryland tests 16 



Advantageous crosses 18 



Disadvantageous crosses 19 



Comparison of first-generation crosses with the 1908 seed of both parents . 21 

 Relative grain production of parent varieties and first-generation 



crosses - - 21 



Stover weights of parents and crosses compared 23 



Corn crosses at Chico, Cal. , 1910 24 



Conditions of the test 24 



Comparison of crosses with parent varieties 27 



Relation of adaptation and yield of parent varieties to the behavior of the 



crosses 28 



Tests in Texas 30 



Work of 1909 30 



Work of 1910 32 



Test at Sherman, Tex 32 



Test at Waco, Tex - 33 



Test at Corsicana, Tex •- 34 



The three Texas tests considered collectively 35 



The productivity of the parent varieties and its influence upon the 



productivity of the crosses 37 



Tests at Statesboro, Ga 42 



Varieties used in the experiments 42 



Aldrich Perfection 42 



Cocke Prolific 42 



Marlboro Prolific 42 



Mosby Prolific r 43 



Native of Statesboro 43 



Rodgers WTiite Dent 43 



Sanders Prolific 43 



218 5 



