696 



INDEX 



Seeding (Continued). 



preparation of land for, 323. 



press drill, 410. 



rate, 328, 365, 407. 



rice, 626. 



time of, 363, 405. 



fall, 326. 



spring, 328. 



under irrigation, 423, 431. 

 Selection, 179. 



De Vries, Hugo, work of, 195. 

 disease, resistance to, 199. 

 elementary species, 195. 

 Hallet, F., work of, 192. 

 Hays, W. M., work of, 193. 

 Johannsen, \V., work of, 195. 

 Le Couteur, work of, 191. 

 Ljung, Erik, work of, 194. 

 methods, 187, 191. 



mass, 187-189. 



pure line, 191, 202. 

 Minnesota, work in, 193. 

 mutations, 195. 



Nilsson-Ehle, H., work of, 194. 

 Nilsson, Hjalmar, work of, 194. 

 planting, 196, 197. 



Centgener, 196. 



plant row, 197. 



pure lines, immutability of, 195. 

 purity of varieties, 189. 

 results of, 198. 

 Rudy, M., work of, 201. 

 Riimker, F. von, work of, 



198. 



seed, heavy and light, 183. 

 seed, large and small, 184. 

 seed plat, 190. 



seed, volume and weight, 186. 

 Shirreff, Patrick, work of, 192. 

 sorting, 179. 



grading and cleaning, 180. 



gravity method, 181. 



roguing, 180. 



specific gravity method, 182. 

 Tedin, Hans, work of, 194. 

 winnowing, 181. 

 Short oats, 102. 

 Side oats, 102. 

 Soil, 304, 339, 375, 591. 

 adaptation for rice, 619. 



Soil (Continued). 



alkalinity of, 249. 



amendments, 306, 341, 376. 



black prairie, 234, 240. 



blowing, 355, 392. 



breaking of, 359. 



calcium-magnesium ratio, 252. 



drainage, 304, 339, 376. 



efficiency, 306. 



environment, favorable, 233. 



erosion, 304, 355. 



heavy, 247, 249. 



liming, 307. 



moisture equivalent of, 248. 



mulch, 363. 



packer, 361. 



packing, 360. 



preparation of, for rice, 626. 



sandy, 247, 249. 



sanitation, 300. 



semi-arid, 351. 



temperature, 252. 



topography of, 304, 339, 376. 



treatment, 304, 339, 375. 



water in the, 246. 



water supply of, 246. 



wilting coefficient of, 249. 

 Soil relations, 233. 

 Spraying with iron sulfate, 468. 

 Summer tillage, 350, 389. 



after plowing or disking, 401. 



in California, 391. 



in Columbia Basin, 392. 



in Montana, 354. 



in Saskatchewan, 354. 



in Utah, 370. 



methods, 362, 395. 



moisture, storage of, 350. 



value, 352. 



Tillage, 350. 

 fall, 403. 



for spring seeding, 399. 

 machines for, 400. 



cut-a-way disk harrow, 402. 



disk harrow, 400. 



knife weeder, 402. 



slicker, 402. 



subsurface packer, 400. 



toothed harrow, 401. 



