422 APPENDIX A 



1909 



The Influence of Depth of Cultivation Upon Soil 

 Bacteria and Their Activities. W. E. King and 

 C. J. T. Doryland. Bulletin 161, Kansas Experiment 

 Station. 



Tests of Pumping Plants in New Mexico. B. P. 

 Fleming and J. B. Stoneking. Bulletin 73, New 

 Mexico Experiment Station. 



On the Relation of Active Legumes to the Soil 

 Nitrogen of Nebraska Prairies. F. J. Alway and 

 R. M. Pickney. The Journal of Industrial and 

 Engineering Chemistry, November, 1909, page 771. 



Tillage and Its Relation to Soil Moisture. C. C. 

 Thorn. Popular Bulletin No. 22, Washington 

 Experiment Station. 



Methods of Tillage for Dry-farming. G. Sever- 

 ance. Popular Bulletin No. 15, Washington Experi- 

 ment Station. 



Dry-farming in Wyoming. V. T. Cooke. State 

 Dry-farming Commission, Cheyenne, Wj^oming. 



Dry-farming in Wj^oming. J. D. Towar. Bulle- 

 tin No. 80, Wyoming Experiment Station. 



Report of the Third Dry-farming Congress, Chey- 

 enne, Wyoming. 



Alfalfa in Cultivated Rows for Seed Production in 

 Semiarid Regions. C. J. Brand and J. M. West- 

 gate, Circular No. 24, Bureau of Plant Industry, 

 U. S. Department of Agriculture. 



Factors Influencing Evaporation and Transpira- 

 tion. J. A. Widtsoe. BuUetin 105, Utah Experi- 

 ment Station. 



