418 APPENDIX A 
The Algerian Durum Wheats: A Classified List, 
with Descriptions. C. 8. Scofield. Bulletin No. 7; 
Bureau of Plant Industry, U. 8. 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 Wheat Varieties. C.8. Scofield. 
Bulletin No. 47, Bureau of Plant Industry, U. 8. 
Department of Agriculture. 
1905 
Macaroni Wheats. T. L. Lyon. Bulletin No. 78, 
Nebraska Experiment Station. 
Report of the Edgley Substation. North Dakota 
Experiment Station. 
The Thorough Tillage System for the Plains of 
Colorado. W. H. Olin. Bulletin 103, Colorado 
Experiment Station. 
Agriculture without Irrigation in the Sahara 
Desert. T. H. Kearney. Bulletin No. 86, Bureau 
of Plant Industry, U. 8. Department of Agriculture. 
Macaroni Wheat: Its Milling and Chemical 
Characteristics and Its Adaptation for Making 
Bread and Macaroni. J. H. Shepherd. Bulletin 
No. 92, South Dakota Experiment Station. 
The Relation of Irrigation to Dry-farming. EI- 
wood Mead. Yearbook, U. 8. Department of Agri- 
culture for 1905, page 423. 
