SOILS AND FERTILIZERS 17 



SOILS BUREAU BULLETIN Continued. 



10. Mechanics of soil moisture. Paper. 5c. 



14. Alkali soils of Yellowstone Valley from preliminary investigation of 

 soils near Billings, Mont. Paper, 15c. 



20. Growing Sumatra tobacco under shade in the Connecticut Valley. 



Paper, lOc. 



21. Reclamation of alkali lands in Egypt. Paper, 15c. 



22. Chemistry of soil as related to crop production, 1903. Paper, lOc. 



23. Investigations in soil fertility. Paper, lOc. 



24. Centrifugal method of mechanical soil analysis. Paper, lOc. 



25. Contributions to our knowledge of aeration of soils. Paper, 5c. 



26. Investigations in soil management : pt. 1, Amount of plant food readily 



recoverable from fluid soils with distilled water; pt. 2, Relation of 

 crop yields to amounts of water-soluble plant-food materials recov- 

 ered from soils; pt. 3, Relation of differences of cliinatological en- 

 vironment to crop yields. Paper, 25c. 



27. Experiments in growing Cuban seed tobacco in Texas. Paper, 5c. 



28. Studies on properties of unproductive soil. Paper, 5c. 



29. Tobacco investigations in Ohio. Paper, 5c. 



30. Mineral constituents of soil solution. Paper, 5c. 



31. Colorinietric, turbidity, and titration methods used in soil investiga- 



tions. Paper, lOc. 



32. Absorption of phosphates and potassium by soils. Paper, lOc. 



33. Calcium sulphate in aqueous solutions, contribution to study of alkali 



deposits. Paper, lOc. 



34. Reclamation of alkali soils. Paper, lOc. 



35. Alkali soils of United States, review of literature and summary of 



present information. Paper, 25c. 



36. Further studies on properties of unproductive soils. Paper, 15c. 



37. Experiments in growing Cuban seed tobacco in Alabama. Paper, lOc. 



38. Studies on movement of soil moisture. Paper, lOc. 



39. Effects of shading on soil conditions. Paper, lOc. 



40. Some factors influencing soil fertility. Paper, lOc. 



42. Reclamation of white-ash lands affected with alkali at Fresno, Cal. 



Paper, lOc. 



43. Reclamation of alkali land in Salt Lake Valley, Utah. Paper, lOc. 



44. Reclamation of alkali soils at Billings, Mont. Paper, lOc. 



45. Moisture equivalents of soils. Paper, lOc. 



46. Improvement of Virginia fire-cured tobacco. Paper, lOc. 



47. Certain organic constituents of soils in relation to soil fertility. Paper, 



lOc. 



48. Fertility of soils as affected by manures. Paper, lOc. 



49. Action of water and aqueous solutions upon soil carbonates. Paper, lOc. 



50. Moisture content and physical condition of soils. Paper, 15c. 



51. Absorption of vapors and gases by soils. Paper, lOc. 



52. Absorption by soils. Paper, 15c. 



53. Isolation of harmful organic substances from soils. Paper, 15c. 



54. Mineral composition of soil particles. Paper, lOc. 



55. Soils of United States, based upon work of Bureau of Soils to Jan. 1, 



1908: pt. 1, Results of recent soil investigations; pt. 2, Classification 

 of soils of United States. Paper, 45c. . 



56. Role of oxidation in soil fertility. Paper, lOc. 



57. Study of crop yields and soil composition in relation to soil productivity. 



Paper, 20c. 



58. Composition of commercial fertilizers. Paper, lOc. 



59. Heat transference in soils. Paper, lOc. 



NOTE. In ordering publications from this List use the words of the title as far as the 

 first period, arid all the composite number which follows the price. 



