418 APPENDIX A 



The Algerian Durum "Wheats : A Classified List, 

 with Descriptions. C. S. Scofield. Bulletin No. 7, 

 Bureau of Plant Industry, U. S. Department of 

 Agriculture. 



1903 



Investigation of the Great Plains and Unirrigated 

 Lands of Eastern Colorado : Seven Years Study. 

 J. E. Payne. Bulletin 77, Colorado Experiment 

 Station. 



The Description of "\Mieat Varieties. C. S. Scofield. 

 Bulletin No. 47, Bureau of Plant Industry, U. S. 

 Department of Agriculture. 



1905 



Macaroni WTieats. T. L. Lj'on. Bulletin No. 78, 

 Nebraska Experiment Station. 



Report of the Edgley Substation. North Dakota 

 Experiment Station. 



The Thorough Tillage Svstem for the Plains of 

 Colorado. W. H. Olin. Buhetin 10.3, Colorado 

 Experiment Station. 



Agriculture without Irrigation in the Sahara 

 Desert. T. H. Kearney. Bulletin No. 86, Bureau 

 of Plant Industry, U. S. Department of Agriculture. 



Macaroni "\^Tieat : Its Milling and Chemical 

 Characteristics and Its Adaptation for ]Making 

 Bread and 2\Iacaroni. .1. H. Shepherd. Bulletin 

 No. 92, South Dakota Experiment Station. 



The Relation of Irrigation to Dry-farming. El- 

 wood INIead. Yearbook, U. S. Department of Agri- 

 culture for 1905, page 423. 



