INDEX 



Abraham, 446. 



Absolute duty of water, 335. 



Absorption by soils, 76. 



of water by roots, 109, 



effect of initial percentage, 111. 

 Adams, 368, 369. 

 Advantage of irrigation, 476. 

 Africa, duty of water in, 338. 



use of saline water in, 387. 

 Agricultural Colony, 461. 

 Alfalfa, 152. 



See also Lucern. 



time of watering, 186. 



protein in, 221. 



yield due .to rainfall, 234. 



under irrigation, 266. 



cultivation of, 268. 



method of irrigation, 269. 



time of irrigation, 270. 



quantity of water for, 274. 



duty of water, 344. 

 Alfalfa seed, 277. 

 Algeria, 83. 



Alkali. See also Over-irrigation and 

 Seepage, 371. 



drainage from a soil, 78. 



upward leaching, 81. 



use of concentrated water, 89. 



defined, 383. 



and seepage, 384. 



upward leaching, 385. 



use of saline water, 387. 



deposits, 388. 



kinds, 390. 



white, brown and black, 392. 



plant tolerance for, 392. 



tolerance of various plants, 394. 



tolerance according to Bureau of 

 Soils, 395. 



cropping against, 397. 



chemical treatment for, 398. 



tillage against, 399. 



scraping against, 399. 



washing out, 400. 



drainage, the remedy, 400. 

 Almonds, spacing of, 317. 

 Alway, 39. 



Amazon, 84. 



America, founding of modern irrigation, 



454. 



Ames, Iowa, 407. 

 Anderson, 405. 

 Anderson, D.H., 484. 

 Anglo-Saxon irrigation, 452. 

 Apples, protein in, 221. 



duty of water for, 322. 



sugar in, 225. 



spacing, 317. 



Application, distribution on, 364. 

 Apricots, spacing, 317. 

 Argentina, 453. 

 Arizona Station, 179. 

 Arkansas River, 83. 

 Artesian water, 410. 

 Ash constituents. See also Plant-food 



in plants, 219. 

 Asia, duty of water in, 339. 

 Asparagus, under irrigation, 309. 

 Assam, India, rainfall at, 2. 

 Assimilation of carbon by plants, 128, 



129. 



Assuan, 338, 452. 

 Assyria, 445. 

 Atlanta, 408. 



Attraction of near bodies, 8. 

 Australia, 453. 



duty of water expression, 331. 



duty of water in, 343. 

 Australian saltbush, alkali -resistant, 

 397. 



Babylon, 445. 



Bacteria, soil, and water, 104. 



Bark, 234, 248, 249, 264, 273, 284, 345, 



369. 

 Barley, under irrigation, 255. 



duty of water, 344. 



alkali-resistant, 396. 



in humid climates, 411. 



early yield, 457. 

 Barri-Doab Canal, 341. 

 Bartlett, 405. 

 Basin irrigation, 207. 

 Beans under irrigation, 301. 



(485) 



