494 



INDEX 



Soil moisture, concentration of, 79. 



contrasted with natural waters, 87. 



use of, by plants, 108. 



initial percentage and use by plants, 

 111. 



effect of distribution on water use, 

 114. 



water-cost of dry matter, 127. 

 forghum, alkali-resistant, 396. 



early yield, 457. 

 South Africa, 453. 



South America, duty of water in, 342. 

 South Dakota, 410. 

 Southwestern Colony, 461. 

 Sowing wheat, 241, 242. 

 Spain, 450. 



duty of water in, 342. 

 Spinach under irrigation, 308. 

 Spring irrigation, 178. 

 Springs, mineral, salinity of, 86. 

 Squash under irrigation, 307. 

 Sugar beets, 152. 



cultural treatment, 286. 



method of irrigation, 289. 

 Stabler, 106. 

 Stannard, 444. 

 Starch in plants, 226. 

 Strawberries, protein in, 221. 

 Strawberries, 326. 



sugar in, 225. 



in humid climates, 411. 

 Stem, proportion of, 163. 

 Stewart, R., 105, 106, 172, 230, 390, 405. 

 Stewart, Henry, 484. 

 St. Julian Canal, 450. 

 St. Lawrence River, 84. 

 Storer, 415. 

 Storing Water in Soil. See Reservoir, 



Soil and Soil Moisture. 

 Sub-surface packer, 62. 

 Sub-surface irrigation, 189. 

 Sugar beets, time of irrigation, 185. 



ash in, 219. 



protein in, 221. 



time to irrigate, 290. 



quantity of water for, 293. 



duty of water, 344. 



alkali-resistant, 396. 

 Sugar-cane, duty of water in Africa, 

 339. 



under irrigation, 411. 

 Sugar in plants, 224. 

 Superintendent for water distribution, 



366. 



Surface irrigation, 193. 

 Surveys, water need of, 90. 

 Suspended matter. See also Sediments. 



Suspended matter in river water, 95. 



seasonal variation of, 98. 



quantity added to soil, 100. 

 Syria, 446. 



Talmage, 405. 



Tannatt, 370, 405. 



Teele, 264, 285, 313, 343, 370, 405, 444. 



Temperature effect on evaporation, 47. 



of soil, 71. 

 Tillage is water, 142. 



effect on composition, 228. 



against alkali, 399. 

 Time, a factor in water use, 115. 

 Time of irrigation, 29, 173. 



at lento-capillary point, 22. 



early spring irrigation, 178. 



winter irrigation, 178. 



irrigation during growth, 182. 



short-season crops, 183. 



long-season crops, 184. 



frequency of irrigation, 185. 



night vs. day irrigation, 187. 



effect on composition, 229. 



wheat, 246. 



for corn, 258. 



of alfalfa, 270. 



of sugar beets, 290. 



for orchards, 319. 

 Timothy, 278. 

 Tobacco, 310. 

 Tollens, 219, 230. 

 Tomato, 171. 



under irrigation, 306. 

 Tools. See also Machines. 



for irrigation, 419. 

 Townsend, 313. 

 Transpiration, 110. See also Water-cost. 



water cost of dry matter, 127. 



water of various plants, 133, 134. 



range of ratio, 134. 



effect of seasons, 136. 



ratio, effect of soil on, 137. 



ratio, denned, 131. 

 Transvaal, 339. 

 True, 405. 

 Tucker, 145, 157. 



Union Colony, 460. 



United States, duty of water expres- 

 sion, 331. 



Department of Agriculture, 343, 464. 



Bureau of Soils, 78, 395, 401. 



Geological Survey, 442, 457, 464. 



Interior Department, 463. 



Irrigation Investigations, 372, 464. 



Office of Experiment Stations, 383. 



