1 6 FARM AND SCHOOL PROBLEMS. 



RUREAU OF SOILS. 

 Number. 



22. The Chemistry of the Soil. 

 28. Studies on the properties of a Sterile Soil. 

 35. Alkali Soils of the United States. 

 34. Reclamation of Alkali Soils. 

 2. Soil Moisture. 

 10. Mechanics of Soil Moisture. 



50. Moisture Content and Physical Condition of Soils. 



51. Absorption of Vapors and Gases by Soils. 



52. Absorption by Soils. 



53. The Isolation of Harmful Organic Substances from Soils. 



54. The Mineral Composition of Soil Particles. 



55. Soils of the United States, Based upon the Work of the Bureau 

 of Soils to January, 1908. Part I, Results of Recent Soil In- 

 vestigations. Part II, Classifications of the Soils of the United 

 States. 



58. The Composition of Commercial Fertilizers. 



59. Heat Transference in Soils. 

 62. Fertilizers for Cotton Soils. 



67. Fertilizers on Soils Used for Oats, Hay, and Miscellaneous 

 Crops. 



68. The Movement of Soil Material by the Wind. 



70. Some Effects of a Harmful Organic Soil Constituent. 



72. Barium in Soils. 



74. Chemical Nature of Soil Organic Matter. 



75. Lawn Soils. 



76. A Review of the Phosphate Fields of Florida. 



77. Organic Compound and Fertilizer Action. 



82. The Effect of Soluble Salts on the Physical Properties of Soils. 



Write to the U. S. Department of Agriculture and ask for 

 Dr. Wiley's "Methods of Analysis", Bulletin No. 107 (Revised). 

 (272 pages). This important work not only gives methods for 

 analysis of soils and fertilizers, but gives methods for analysis 

 of plants, foods and feeding stuff, liquors, drugs and various 

 products. It should be in every well equipped agricultural lab- 

 oratorv. 



