AUTHORS INDEX 



747 



Tnorne, C. E., Farm manure, 581. 



Losses of manure, 599. 



Manure and the rotation, 616. 



Production of manure, 587. 



Reinforcing manure, value, 610. 



Value of manure, 590, 601. 

 Trowbridge, A. C., Classification of sedi- 

 ments, 31. 

 Truog, E. A.. Sulfide test for soil acidity, 



387. 



Tularkov, N., Classification of soils, 718. 

 Tull, Jethro, Effects of tillage, 490. 



Ulrich, R., Specific heat of soil, 295. 

 Underwood, T. M., Soil solution and 

 plant growth, 347. 



Vail, C. E., Composition of humus, 148. 

 Van Bemmelen, J. M , Adsorption, 359. 

 Colloids, 161. 

 Colloidal humus, 365. 

 Colloidal material, 346. 

 Color of soil, 77. 

 Composition of humus, 133. 

 Estimation of colloids, 167. 

 Soil solution, 345. 

 Van Slyke, L. L., A general fertilizer, 



571. 



Composition of manure, 584. 

 Fertilizers, 546. 

 Fertilizer mixtures, 565. 

 Production of manure, 587. 

 Van Suchtelen, F. H. H., Soil solution in 



situ, 344. 

 Veitch, F. P., Complete solution of soil, 



330. 



Composition of soil, 66. 

 Test for acidity, 390. 

 Voelcker, .J. A., Composition of rotted 



manure, 596. 

 Manure, 579. 

 Soil acidity, 383. 



Von Engeln, O. D., Glaciation and agri- 

 culture, 70, 71. 



Voorhees, E. B., Availability of fer- 

 tilizers, 510. 

 Poultry manure, 588. 



Waggaman, W. H., Absorption by soil, 



351. 

 Wagner, F., Conductivity in soil, 310. 



Manure and soil temperature, 316. 



Texture and conductivity, 309. 

 Wagner, H., Law of minimum, 553. 

 Wagner, P., Availability of fertilizers, 



510. 



Wahnschaffe, F., Silt cylinder, 92. 

 Warington, R., Causes of granulation, 



186. 



Colloids, 161. 

 Composition of crops, 418. 

 Composition of drainage water, 240. 

 Denitrification, 456. 

 Estimation of organic matter, 143. 

 Evaporation losses, 271. 

 Lime and granulation, 194. 

 Nitrification, 453. 

 Snow and soil temperature, 306. 

 Warren, G. M., Marsh land drainage, 



627. 



Waters, H. J., Lime, 541. 

 Watson, G. C., Production of manure, 



587. 

 Way, J. T., Absorption by soil, 355. 



Colloids, 161. 

 Weir, W. W., Soil acidity, 383. 



Test for carbonates, 388. 

 Welitschkowsky, D. von, Temperature 



and movement of water, 234. 

 Wheeler, H. J., Acid-tolerating plants, 



38. 



Acidity tests, 387. 

 Forms of lime, 542. 

 Plants injured by acidity, 385. 

 Salt as a fertilizer, 544. 

 Wheeler, W. P., Poultry manure, 582. 

 Whipper, O. B., Irrigation of fruit, 682. 

 Whitbeck, R. H., Glaciated and residual 



soils, 70. 

 Whitney, M., Apparent specific gravity, 



114. 



Soil classes, 104. 

 Soil solution, 346. 

 Specific gravity of soil, 113. 

 Whitson, A. R., Soil acidity, 383. 



Test for carbonates, 388. 

 Wickson, J. A., Irrigation of fruit, 682. 

 Widtsoe, J. A., Amount of water to 



apply, 710. 



Capillary movement, 224. 

 Dry-farming, 712. 

 Dry matter and water, 254. 

 Irrigation water and yield, 708. 

 Movements of irrigation water, 704. 

 Principles of irrigation, 682. 

 Storage of water in soil, 709. 

 Water requirement of plants, 248, 



251. 

 iViegner, G., Absorption by permutite, 



357. 

 Wiley, H. W., Complete solution of soil, 



