544 



EXPERIMENT STATION RECORD 



Soils— Continued. 



potash content, (27) 323, 500. 



potash solubihty in, as affected by gypsum, 



(39) 521. 



potassium adsorption by, (34) 817. 



potassium liberation from, (33) 517. 



prairie, phosphorus in, (36) 514. 



preparation, (28) 291. 



productive and unproductive, examination, 



(30) 819. 

 productivity — 



as affected by dry air storage, (34) 812. 



determination, (38) 812. 



of different layers, (34) 215. 

 protein decomposition in, (36) 25. 

 protein nitrogen in, distribution, (39) 204. 

 proteoses and peptones in, (34) 325. 

 pseudo-isotropic, heat movement in, (31) 24. 

 pumice, of New Zealand, notes, (27) 513. 

 quicklime conversion in, (40) 622. 

 radiating pov^er, (29) 618. 

 radioactive emanations of, (31) 20. 

 radioactivity, (27) 500; (28) 30; (31) 418. 

 radioactivity, treatise, (33) 809. 

 radium and thorium emanations in, (27) 418. 

 rarer elements in, (38) 409. 

 rawness of subsoils, (39) 620, 621; (40) 121. 

 reaction— 



and basicity of, (30) 623. 



of, (34) 504; (38) 620. 



of, determination, (36) 505; (38) 419. 



relation to grinding, (34) 112. 



with chemicals and behavior of equi- 

 librium, (39) 11. 

 red- 

 analyses, (32) 723. 



chemical and physical nature, (28) 421. 



clay, fertilizers for, (33) 617; (36) 323. 



clay, of Porto Rico, (30) 818. 



colloidal properties, (32) 318. 



fertilizer requirements, (29) 623. 



formation, (29) 514, 622; (31) 513. 



laterite, of Europe, (27) 513. 



of BrazU, (30) 622; (35) 725. 

 Italy, origin, (39) 513. 

 Karstian, analyses, (35) 721. 

 Limburg, Netherlands, (38) 513. 

 Mediterranean region, (36) 115. 



properties, (31) 618. 



sandstone of Germany, (26) 121. 

 reduction of salt content, (29) 32. 

 reduction phenomena, (40) 214. 

 relation between unfree water and heat of 



wetting, (40) 20. 

 relation to — 



asparagus culture, (20) 640. 



climate and weather, (34) 514. 



fertilizer requirements of crops, (28) 722. 



forests, (38) 542. 



fungi, (27) 728. 



grape roncet, (28) 349. 



meteorological factors, (28) 116; (35) 15. 



mineral composition of parent rocks, (28) 

 622. 



plants, (29) 212; (31) 791. 



potato leaf-roll, (27) 447. 



stem diseases, (26) 646. 



weeds, (27) 29, 417; (29) 30, 523. 

 relative unilateral impoverishment by various 



crops, (39) 724. 

 respiration of bacteria in, (27) 122. 

 review of investigations, (27) 417; (28) 325, 717; 



(30) 119; (31) 723; (33) 512, 7;7; (35) 516. 

 role of— 



Actinomycetes in, (36) 518. 



spore-forming bacteria in, (36) 517. 



Streptothrix in, (27) 620. 

 rubber, of Malay States, analyses, (32) 420. 

 rubber, requisites of, (28) 422. 



of Egypt, dramage, (35) 685. 

 of Mediterranean coast, (28) 620. 

 plant life on, (40) 221, 424. 

 studies, (28) 516. 

 salt in, determining by freezing-point method, 



(40) 315. 



salts in, movement, (33) 513. 



salts in, relation to cultivated plants, (28) 426; 



(31) 627. 



Soils- Continued, 

 salt-treated— 



effect on absorption by seeds, (37) 527. 



moisture equivalent, (39) 215. 

 sampler, description, (34) 513, 811; (37) 811. 

 samples — 



collecting and testing, (26) 221. 



preparation for study, (30) 422. 



variability, (39) 815. 

 sampling, (28) 215; (35) 121; (36) 617; (37) 719, 



811; (39) 618, 829; (40) 317. 

 sampling apparatus for, (30) 421, 838. 

 sandy — 



analysis methods, (31) 719. 



and clayey, oat sickness in, (32) 442. 



and pebbly, of Finland, (36) 813. 



as aflected by humus, (31) 732. 



green manuring experiments, (26) 224; 

 (30) 24. 



improvement, (27) 899; (28) 32; (31) 723; 

 (32) 124; (33) 121. 



lime requirements, (31) 726. 



loam, salts in, (30) 517. 



management, (28) 815; (33) 325, 



nitrogen fixing power, (33) 619. 



of Michigan, (27) 720. 



of Tripoli, (27) 217. 



pine plain, of Wisconsin, (39) 115. 



treatment with moor soil, (30) 625. 



utilization, (26) 621. 

 Sassafras series, (32) 512. 

 saturation formula for, (33) 816. 

 seepy, drainage, (26) 892. 

 semiarid — 



movement of salts in, (28) 421. 



nitrification in, (36) 422. 

 sewage purification by, (35) 388. 

 sewage-sick, investigations, (28) 119, 623. 

 sewage-sick, protozoa from, (29) 316. 

 shifting, grass for, (39) 441. 

 shrinkage, (38) 321; (40) 419. 

 shrinkage and friability, (27) 120. 

 sick, investigations, (28) 119. 

 sick, treatment, (27) 824, 847. 

 slick spots in, (39) 229. 

 slime formation in, (29) 723. 

 solubility— 



of manganese in, (28) 813. 



of nitrogenous compounds in, (29) 108. 



studies, (33) 513. 

 soluble salt content, (40) 512. 

 specific gravity, (33) 206. 

 sponge spicules in, (27) 500, 622. 

 steamed, chemistry of, (28) 417, 418. 

 steamed, reinoculation, (27) 499; (28) 30. 

 sterUization, (26) 322; (28) 324, 623; (32) 321, 423, 

 620; (35) 21; (36) 518; (37) 213, 319, 421, 519, 

 719; (38) 17, 420, 514, 556, 720. 

 sterilization — 



and disinfection of, (31) 621. 



by antiseptics, (32) 816. 



by caustic lime, (29) 730; (30) 399; (31) 519. 



by lime, (32) 32. 



effect on bacterial growth, (28) 329. 



effect on plant food production, (29) 122. 



experiments, (40) 147. 



in forcing houses, (31) 336. 



partial, (27) 722; (28) 538; (31) 27; (35) 615; 

 (40) 23, 619. 



review of investigations, (28) 815. 



studies, (29) 221. 

 sterilized — 



and reinoculated, water-soluble matter in, 

 (29) 22. 



effect on crop yield, (30) 217. 



effect on plant growth, (30) 225. 



nitrate reduction in, (3l) 121. 



productivity, (31) 819. 



solubility of phosphoric acid in, (28) 417. 

 stored, nitrogen content, (39) 421. 

 subarctic, unusual features, (38) 732. 

 sugar inversion by, (40) 123. 

 sulfofication in, (36) 22. 



sulfoflcation in as affecting nitrogen transforma- 

 tions, (39) 823. 

 sulfofying power, (31) 318; (37) 119. 

 sulphates in, determination, (39) 12. 

 sulphur — 



bacteria in, (33) 23. 



in, (30) 20. 



