INDEX 



751 



Availability of plant-food and bacteria, 



428. 

 Availability of soil water, diagram, 262. 

 Azotobacter bacteria, 464. 



Bacillus, denitrificans, alpha and beta, 

 456. 



mesentericus, reducing organism, 455. 



mycoides, reducing organism, 455. 



pestifer, reducing organism, 455. 



radicicola, 459, 545. 



mdiobader, 464. 



ramosus, reducing organism, 455. 



suUilis, reducing organism, 455. 



vulgaius, reducing organism, 455. 

 Back fxirrow, 671. 

 Bacteria and ammonification, 446. 



and plant decay, 129. 



and root nodules, 458. 



carbon dioxide production, 408. 



conditions for growth, 433. 



distribution, 429. 



functions, 436. 



in frozen soil, 431. 



influence of sulfur on, 525. 



influence on organic matter, 435. 



inoculation with, 460. 



nitrate reduction, 455. 



number in soil, 430. 



nitrogen supply, 428. 



non-symbiotic, 460. 



solvent action of, 439. 

 Bacteria in soil, 427, 428. 

 Bacterial action, effect on phosphates, 



520. 

 Bacteroids, 460. 

 Bacterium dlenhacheTisis, 463. 

 Balanced fertilizer, 551. 

 Barnyards, covered for manure, 605. 

 Barometric pressure and drainage, 234. 

 Basalt, 8. 



Bases absorbed, solubility of, 354. 

 Bases, absorbed by colloids, 165. 

 Bases and toxicity, 379. 

 Bases in plant ash, 378. 

 Bases, removed in drainage, 378. 

 Basic rocks, 7. 

 Basic slag phosphate, 513. 

 Basic soil, effect on phosphates, 519. 

 Bacillus amylobacter, 440. 

 Bedding, absorptive capacity, 603. 

 Biotite, 9. 



Biotite, solubility, 330. 

 Black alkali, 392. 

 Blood, dried, as fertilizer, 607. 

 Bones as fertilizer, 511. 



Bone phosphate, 511. 



Bone tankage, 512. 



Brands of fertilizer, 555. 



Broadcasting fertilizer, 570. 



Brombcrg, composition of drainage 



water, 370. 

 Bureau of soils, classification of alkali, 



396. 



Calcium, 4, 6. 



Calcium carbonate, 7, 10. 



Calcium carbonate in soil, 333. 



Calcium combinations, 539. 



Calcium compounds, root action on, 406. 



Calcium cyanamid, 502. 



Calcium hydrate in fertilizer, 566, 



Calcium in soil separates, 101. 



Calcium loss in drainage, 372. 



Calcium nitrate, 505. 



Calcium phosphate, effect of bacteria on, 



439. 

 Calcium salts, as amendments, effects, 



534. 

 Calcium sulfate to reinforce manure, 



609. 

 Calculation of air space of soils, 238, 477. 



of apparent specific gravity, 113. 



of free water, 238. 



of number of soil particles, 118. 



of pore space, 116. 



of surface of soil particles, 120. 



of wilting point, 260. 

 Canals for drainage, construction, 635. 

 Canals for irrigation, 693. 

 Capillarity and texture, 214. 

 Capillarity carries nitrates to surface, 



454. 

 Capillary movement, 221, 



and alkali formation, 298. 



in wet and dry soil, 225. 



influenced by thickness of film, 223. 



influenced by surface tension, 227. 



influenced by texture, 229. 



influenced by structure, 232. 



intercepted by green manure, 624. 

 Capillary water, 201, 210. 

 Capillary water, amount, 213. 



and organic matter, 218. 



and structure, 217. 



and surface tension, 213. 



and texture, 214. 



estimation of, 219. 



factors aflfecting amount, 213. 



form of surface, 212. 



relation to plant, 261. 

 Capillarity and ground water, 214. 



