INDEX 
districts, 360; beginnings of 
dry-farming in California, 357; 
. Campbell’s work, 861; begin- 
nings of dry-farming in Colum- 
bia Basin, 357; beginnings of 
dry-farming in Great Plains, 358 ; 
beginning of modern dry-farm- 
ing in Utah, 354; railroads and 
dry-farming, 370; the work of 
the experiment stations, 365; 
the Dry-farming Congress, 374; 
work by the United States De- 
partment of Agriculture for dry- 
farming, 372; present status in 
California, 383; present status in 
Colorado and Rio Grande ba- 
sins, 388; present status of dry- 
farming in Columbia Basin, 384; 
present status of dry-farming, 
382-398 ; status in foreign coun- 
tries, 391; present status of dry- 
farming in Great Basin, 386; 
status in Great Plains, 389; 
status in Mountain States, 389. 
Hoed crops, in place of fallowing, 
200; in rotations, 299. 
Hoeing, possible hand hoeing, 141. 
Hogenson, 313. 
Holland, variation in plant compo- 
sition in Holland, 269. 
Homestead Bill, the Smoot-Mondell, 
for dry-farms, 425. 
Homesteads, on dry-farms, 332, 416. 
Hopkins, 185. 
Horsebeans, pounds water for one 
pound, 14. 
Hoseus, 84. 
Humid, defined, 24. 
Humid-farming, defined, 1, 4; 
vs. dry-farming, 4. 
Humidity, see Relative Humidity. 
Humus, in soils, 58; nitrogen in, 
59, 71; and fallowing, 198; and 
green manuring, 297; and header 
stubble, 198; and lime, 70. 
Hunt, 225. 
Hygroscopic moisture, 102, 137. 
2F 
435 
Idaho, area, 26; soils of, 75; evap- 
oration in, 132; fallowing in, 
197; milo in, 246; wheats in, 
240; present status of dry-farm- 
ing, 385, 386, 389. 
Idaho Station, dry-farming in, 369. 
Iilinois, water needs of crops on 
soils of, 185. 
Implements, see Machinery, Engines ; 
for dry-farming, 301-327; for a 
dry-farm, 327; steam and other 
motive power, 321. 
India, sands of India fertile, 58; 
field-water capacity of soils, 110; 
pumping plants in, 341; dry- 
farming, 353. 
Indian, corn grown by American, 
244. 
Indian Head, 
ewan. 
Indian Head farm, longest record 
in Great Plains, 359, 406. 
Indian Head Station, dry-farming 
in, 370. 
Insoluble residue, in soils, 68. 
Irrigation, see also Water; and dry- 
farming, 328-350; indispensable 
in arid regions, 331; supple- 
mentary only to natural precipi- 
tation, 345; and plant growth, 
261; development of roots under, 
90; economy in small applica- 
tions, 346; case of economical 
irrigation in Arizona, 348; use 
of little 'water in, 344; advan- 
tages of, 329; why mostly prac- 
ticed in antiquity, 352. 
see also Saskatch- 
Jardine, 200, 236, 240. 
Jensen, 190. 
Jerusalem corn, 245. 
Johnson, 154. 
Jujube tree, on dry-farms, 252. 
Kafir corn, 245. 
Kansas, area, 27; type of rainfall 
over, 40; soils of, 74; climate 
