1919] 



INDEX OF SUBJECTS, 



993 



Soils — Continued. 



as affected by sulfoliciition and niiri- 

 flcation, 324. 



as affected by sulphur and sulpb\iric 

 acid, 427. 



" bara," studies, 720. 



bare, mulched, and weed-grown, mois- 

 ture and nitrate content, Kans., 33. 



bhatta, biological studies, 812. 



biological activitj' in relation to mois- 

 ture and croppin;;, S12. 



biological data, relation to fertility, 

 321. 



blowing, U.S.D.A., 442. 



bog, sand and clay treatment and fer- 

 tilizer experiments, 230. 



cacao, as affected by shading, 213. 



carbon determination in, 206. 



carbon dioxid, ammonia, and nitrate 

 formation, 421. 



carbon dioxid and hydrogen reaction, 

 720. 



Caribou loam, fertilizer requirements, 



. Me., 131. 



chemistry of, 201, 501. 



classification, 316, 620, 621. 



clay plasticity phenomena, 719. 



colloid clay percentage, relation to con- 

 traction, 812. 



colloidal condition, reversibility, N.Y. 

 Cornell, 121. 



colloids of, effect on reactions, 720. 



composition as affected hy manure, 

 420. 



courses, laboratory work, 896. 



cropped and cultivated, water absorp- 

 tion and run-off on, Mo., 622. 



cropped and virgin, solution, 420. 



cropped, nitrification, 720, 812. 



disinfection, 49. 



effect on ash constituents of crab 

 grass, 502. 



effect on composition of crops, 422, 

 813. 



examination, 423. 



fluorin in, 126. 



forest, nitrification in, 125. 



heated, influence on germination and 

 plant growth, 215. 



heating experiments, Hawaii, 138, 



H-ion concentration, 123. 



humus content, determination, 803. 



humus, of Sweden, classification, 511. 



humus-poor, of Sweden, classification, 

 510. 



in relation to fertilizers, 423. 



interpreting by phytometer method, 

 327. 



inverting power, 321. 



lime requirement, 428, 520. 



lime requirement, end-point, 123. 



lime i-equirement, relation to ammo- 

 nia retention, 320. 



manganese, methods of handling, Ha- 

 waii, 138, 148. 



manured, ammoniflcation in, 20. 



mapping, 316, 810. 



Soils — Continued. 



mechanical composition as affecting 

 nitrogen utilization, N.J., 22. 



mechanical composition as affivting 

 solubility, Mich., 512. 



methods of analysis by washing, G21 



moor. (See Peat and Moor.) 



movement of plant food in, 214. 



muskeg, culture experiments, Minn., 

 387. 



nitrogen content. {See Ammonifica- 

 tion. Nitrification, Nitrogen, etc.) 



of Delaware, fertilizer and lime re- 

 quirements, Del., 130. 



of Egypt, biological studies, 812. , 



of Essex, lime requirement, 724. 



of Georgia, analyses, 317, 318, 512, 

 718. 



of Hawaii, flora of, 217. 



<if India, analyses and classification, 

 C21. 



of India, biological studies, 720, 811, 

 816. 



(if India, fertilizer requirements, 515, 

 S13, 814, 816. 



of India, lime requirement, 515, 816. 



of India, studies, 719, 720. 



of Indian tea districts, 718. 



of Indiana, fertilizer requirements, 

 Ind., 218. 



of Indiana, legumes for, Ind., 19. 



of Iowa, liming, Iowa., 24. 



of Italian colonies, 021. 



of Michigan, classifleation, 620. 



of Minnesota, 212, 512. 



of Mississippi, 621. 



of mountain prairies, fertilizer require- 

 ments, 722. 



of Now Zealand, analyses, 621. 



of North Wales, studies, 811. 



of Nova Scotia, anal.vses, 811. 



of Ohio, peat and muck, Ohio, 212. 



of prairies, moisture content, 514. 



of Quebec, analyses, 318. 



of Queensland, lime and magnesia con- 

 tent, 718. 



of Union of South Africa, analyses, 

 621. 



of vicinity of Ottawa, 419. 



organic and inorganic acids as affect- 

 ing solubility, Mich., 513. 



organic matter in. (See Organic mat- 

 ter.) 



paddy, gaseous products of decompo- 

 sition, 720. 



pamphlet of popular information, 813. 



peat. (See Peat.) 



penetration by temp(>rature waves,. 

 422. 



physical texture, relation to produc- 

 tivity, 719. 



rawness of subsoil, 322. 



rocky, dynamiting, 624. 



rdle in nitrogen storage by high-alti- 

 tude grasses, Wyo., 333. 



role in vegetation of Avra Valley. 220. 



rubber and coconut, Malayan, 319. 



