INDEX TO YEARBOOKS, 1901-1905. 141 



Soil preparation and fertilization for planting for adornment, 1902, 517. 

 for fruit growing, 1904, 173-174. 

 planting apple trees, 1901, 595. 

 potatoes at Greeley, Colo., 1904, 316. 

 sugar beets, discussion, 1903, 404, 405. 

 problems for practical farmers, article by E. C. Chilcott, 1903, 441-452. 

 relation of chemical and of physical condition to crop yield, 1903, 67-68. 

 texture and plant food to plant growth, 1901, 158. 

 to corn production with differences of seed, 1902, 550, 551. 



plant growth and production of changes, notes, 1904, 123, 124, 125. 

 production of wheat, note, 1901, 303. 

 strength of cotton fiber, 1903, 131. 

 requirements, manurial. Soils Bureau studies, 1905, 72. 

 selection, breeding corn for seed, 1902, 548. 



solution, excessive concentration. of nutrients, injury, note, 1902, 563. 

 sources of nitrogen, remarks, 1901, 168. 



structure, openness, value in movement of air and water in root zone, 1903, 164. 

 sugar beets, points in selection, 1903, 401. 

 survey, area mapped, table, 1901, 43. 



areas surveyed and mapped, cost and value of work, 1903, BO, 61, 62. 

 cost per square mile, 1904, 72. 

 development, remarks, 1901, 124. 

 early work, remarks, 1905, 64. 

 extension to general crops, 1901, 126. 



for tobacco in Pennsylvania, New York, and Wisconsin, 1902, 74. 

 illustration of work in the field, 1901, 121. 

 methods, cost, etc., discussion, 1901, 120-124. 

 nature and purpose, remarks, 1902, 48. 

 popularity, remarks, 1901, 57. 

 Porto Rico, Arecibo to Ponce, 1904, 103. 

 progress and cost, 1901, 42; 1902, 43-^6, 65; 1904, 70-72. 

 publication of maps and reports, 1904, 72. 

 purpose, article by Milton Whitney, 1901, 117-132. 

 work, discussion of value, 1901, 128. 

 smrveys, insular, needed legislation, 1902, 67. 

 nature and purpose, 1902, 48. 

 practical utilization, remarks, 1905, 70. 

 technology, necessity of a division to try new methods, 1901, 53. 

 types of Neuse River Valley, 1901, 48. 

 washing, danger as a result of fallowing, 1905, 471. 



of surface, porosity and granulation as check, 1903, 163-164, 165. 

 prevention by terraces, discussion, 1903, 176, 178-180. 



remarks, 1905, 195. 

 southern farms, necessity of check by diversified farming, 1905, 206. 

 See also Erosion, 

 water, drainage as factor in regulation, 1902, 232. 

 Soiling crops for cows on model farm, 1903, 366, 367. 



study, 1904, 42. 

 Soils, alkali, cooperative work in breeding suitable plants, 1901, 25. 



of Yellowstone and Salt Lake valleys, reclamation, notes, 1901, 50. 

 analyses, delicate methods, remarks, 1902, 67. 

 areas surveyed and mapped, summary by States, 1901, 43; 1902, 725; 1903, 



561-562; 1904, 598-600; 1905, 617-619. 

 Bureau, cooperation in soil study in Porto Rico, 1901, 510. 

 expenses of work, 1901, 56. 



experimental growing of wrapper tobacco, notes, 1904, 437. 

 note on extent of work in 1901, 1901, 117. 



organization and duties, 1901, 613; 1902, 662; 1903, 511; 1904, 541; 

 1905, 565. 

 of field force, remarks, 1902, 46. 

 publication of reports and maps, 1902, 66. 

 report of field operations, remarks, 1903, 62. 

 study of water-soluble salts, 1903, 169. 

 summary of areas surveyed, 1905, 65. 

 tobacco experiments in Virginia, 1905, 220-221. 

 work, discussion, by States, 1902, 49-65. 



review by Secretary, 1901, 10, 39, 57-58; 1902, 42-77; 1903, 58-68; 

 1904, 69-98; 1905, 62-74. 



