6 CONTENTS. 



Tests at Statesboro, Ga. — Continued. 



Varieties used in the experiments — Continued. Page. 



Station Yellow 43 



Tindal 44 



Whelchel 44 



Williamson 44 



Work of 1909 45 



Character of the soil 45 



Culture 46 



Harvest 46 



Work of 1910 46 



Vitality of seed tested before planting 46 



Plan of testing productiveness in 1910 47 



Conditions for growth 49 



Manner of harvesting 49 



Moisture in grain harvested 49 



Presentation of results in Georgia 50 



Data collected at harvest 50 



Some crosses superior to either parent 61 



Relation of the producti\'ity of the crosses to the productivity of the 



pure strains 62 



Adaptation as a factor in the production of higher jaelds through 



crossing 62 



Influence of seasonal differences 63 



Inferences drawn from the foregoing data 63 



General consideration of all the tests 64 



Indications of intermediacy 64 



Percentage of moisture in shelled grain of crosses and parent varieties 65 



Unreliability of averages for specific instances 65 



Index 69 



ILLUSTRATION. 



Page. 

 Fig. 1. Diagram showing the relative production of parent varieties of com 



and their first-generation crosses in Maryland, 1910 22 



218 



