CONTENTS 



Page. 



Introduction 7 



Objects sought 7 



History of the investigations 9 



Stations where work is now in progress 10 



Inception of the work 10 



Bellefourche Experiment Farm 10 



Akron Dry-Land Station ' 12 



Alfalfa breeding for drought resistance 12 



Alfalfa breeding at the Bellefourche Experiment Farm 12 



Segregation of strains 12 



Breeding methods used 15 



Uniformity of plants in the progeny rows 16 



Comparative yields of the different strains and progenies 17 



Winterkilling 18 



Future testing of strains 19 



Alfalfa breeding at the Akron Dry- Land Station 19 



Seed production of alfalfa planted in hills 19 



Breeding drought-resistant sorgos 20 



Conditions to be met . . .'. 20 



Sorgo breeding at the Bellefourche Experiment Farm 22 



Sorgo breeding at the Akron Dry-Land Station 23 



Breeding drought-resistant millets 24 



Segregation of strains 24 



Results of preliminary work at the Highmore substation 24 



Variety tests at the Bellefourche Experiment Farm 24 



Millet breeding at the Bellefourche Experiment Farm 25 



Breeding methods 25 



Results of the work 25 



Dates of ripening 27 



Uniformity in the progeny rows 27 



Millet breeding at the Akron Dry-Land Station 27 



Brome-grass 29 



Western wheat-grass 30 



Slender wheat-grass 31 



Agropyron cristatum 32 



Canada peas 32 



Summary 33 



Conclusion 34 



Description of plates 36 



Index 37 



196 5 



