448 
Gastridium ventricosum, 354 
Genetics, needed research, 22, 24, 
425 
Geochronology, 29, 161~71 
Geography, 200-20 
needed research, 427-28, 431-33 
Geology, 392 
needed research, 430-31 
Geomorphology, 30-32, 210-12 
needed research, 32, 117, 119 
Geven, U2 Wo, 138 
Gibrat, G., 88 
Grasshopper, 383-89 
Grazing (see Range) 
Great Plains, 19, 228 
Gregor, J. W., 348 
Ground water, 23, 32-34, 53-54, 
IOS), WAR, WIS) 
Africa, 135-37 
exploration, 125-26 
needed research, 34, 56, 174, 430 
recharge, of aquifers, 56, 105-6, 
131, 132-34 
salinity, 107, 127-31, 267 
use and misuse, I0g-II, 126-27, 
198 
Guayule, 22, 414 
Gunn, R., 316 
Gypsophila rokejeka, 399 
Hagedoorn, A. L., 336 
Halogeton, 354 
Haloxylon persicum, 398, 400 
Hample, C. A., 261 
Hawkins, R., 261 
Hayward, H. E., 57, 265 
lefterninanep hesn| 2g 
Heinrich, R., 9 
Hemizonia, 356 
Hendry, G. W., 351 
Heyne, E. G., 348 
Hiesey, W. M., 347 
Hilgard, E. W., 352 
Homestead laws in U.S., 19 
INDEX 
Homoclimates, 29, 74, 336 
Hopi Indians, 16-17 
Hordeum bulbosum, 396, 398 
Hordeum murinum, 352 
Hordeum vulgare, 350 
Horse, 335 
Horton, R. E., 81 
Howard, C. S., 283 
lakoyes Jen We, B77, 202 
Human health, 40, 61-62 
Hydrophytes, 7-9 
Hydrology, 85-103, 123, 134 
needed research, 141-43, 197, 
ASS 
Hyoscyamus muticus, 399 
Hyparrhenia hirta, 186 
Hypericum perforatum, 354, 356 
Ice nuclei (see Precipitation-in- 
duced) 
Ula, Wile Ss, Qua 
India, 51, 180-82 
Council of Agricultural 
search, 182 
Desert Research Station, 251 
Rajasthan desert, 250, 253 
solar energy, 62 
Indus River, 47, 49, 54 
Interdisciplinary programs, 432-35 
Interior drainage, 6 
International cooperation, 45, 63, 
MGV MNt7) ASOLO, Aj 7%, 
396, 401, 428-35 
International Geophysical Year, 
428 
International 
need, 410 
Inter-Territorial Hydrological Con- 
ference, British Africa, 134 
Rontess ines .2774— 75 
Irrigation, 43 
ancient works, [6,0 2lgOsmgle 
98, 246, 248, 402 
boron limits, 283 
Re- 
research center, 
