446 
Arroyo cutting, 11§—-17, 166, 234— 
35 
Artemesia herba-alba, 399 
Artemesia monosperma, 399, 401 
Asia, 16 (see also India) 
Central, 51 
locust areas, 384 
Atriplex halimus, 397, 398 
Atriplex sembibaccata, 398 
Atriplex species, 338 
Atriplex spongiosa, 398 
Atriplex vesicaria, 398 
Amoiserllial, As, Ady Ag, 58, OS 
grasshopper area, 384 
meteoritic particles, 295-99 
seeding of clouds, 292 
surface waters, 131 
Avena barbata, 186 
Avena species, 352, 354 
Avena sterilis, 398 
Babcock, W. M., 335 
Bailey, R. W., 419 
Bellue, M. K., 351 
leary, IL. |o5 ASO, Bz 
Bolton, J. G., 292 
BOSE, Vo Nt UA TG), WDE 
Bouteloua species, 239 
Bouteloua curtipendula, 347 
Botany, needed research, 22, 231, 
431 
Bowen, E. G., 280, 301, 311, 316 
Brazil, better land use, 212-17 
drought polygon, 205-8 
Nordeste, 200-5 
water storage, 208-12 
Breeding, of animals, 335-37, 431 
of plants, 24, 39, 349, 414-18 
Brewer Ve lleen 350: 
Bromus rigidus, 354, 355 
Bromus rubens, 354 
Bromus species, 346, 347, 352, 354 
Browne, W. R., 128 
Brunson, A. M., 348 
Bryan, K., 167 
INDEX 
Cactus, 38 
Caldwell, M. C., 22 
California, evaporation, 71-72 
field tests on range, 345-47 
grass experiments, 359-62 
recharge of aquifers, 133 
solar energy, 63 
vegetation changes, 351-57 
Calligonum comosum, 398, 401 
Camel, 334 
grazing area, 377-80 
use of water by, 372-80 
Canada, 45, 186 
Canaigre (see Rumex hymenose- 
palus) 
Candelilla wax, 414-15 
Cappario spinosa, 399 
Carbon-14 dating, 29, 166-67 
Cenchrus species, 60 
Ceylon, 49 
Chaffey, G., and W. R., 47 
Citrullus colocynthts, 399 
Clausen, R. E., 347, 349 
Climate, 4-5, 28-30, 67-84, 87-94 
Climatic changes, 29, 51, 93, 123- 
Noe Wole—FAit, WO), NOP) 
Climatology, needed research, 28— 
29, 74, 142, 155, 428-30 
Cloud surveys, 310, 430 
Colorado, 5, 6, 19, 20, 28 
precipitation and water yield, 
156 
water need, 81 
Colorado River, 173 
Columbia River, 191, 192 
Commonwealth Scientific and In- 
dustrial Research Organiza- 
tion of Australia, 186 
Colutea tstria, 394, 398 
Combined resource use, 44, III, 
IgO-g2, 217-18, 267, 420-23 
Conrad oy, 
Convolvulus species, 401 
Cooper, J. P., 350 
