SUBJECT INDEX 



535 



Soil— Continued. 



pressures, determining, (36) 684. 

 problems in Oklahoma, (26) 434. 

 productivity— 



as affected by sugar, (28) 623. 

 as affected bv sugar beets, (28) 336. 

 factors in, (35) 513. 

 increasing, (29) 329. 

 judging, (29) 820; (36) 117, 511. 

 notes, (28) 292. 

 profile survey of — 



Henrys Fork, Idaho, (36) 583. 

 Rio Grande, (36) 583. 

 reaction— 



as affected by lime, (40) 124. 



as affecting nitrogen-assimilating bacteria, 



(39) 619, 722, 723. 

 importance, (26) 422. 

 relation to weed growth, (40) 832. 

 sanitation, notes, (34) 744. 

 sanitation, relation to cereal cropping, (29) 516, 



820. 

 scarifier, description and tests, (28) 486. 

 science, new, and plant ecology, (36) 523. 

 sickoGss^"" 



in wheat lands, (31) 148. 

 investigations, (28) 520. 

 notes, (28) 321. 



review of investigations, (28) 815. 

 studies, (36) 514. 

 treatment, (26) 322; (31) 146. 

 "sicknesses" in Netherlands, (40) 319. 

 solution — 



as affected by boiling, (30) 124. 



index of biological changes, (39) 813. 

 inde.x of soil fertUity, (30) 124; (31) 620. 

 related to growth of barley, (40) 218. 

 colloidal substances in, (28) 516. 

 composition, (27) 500; (37) 116. 

 composition and use, (36) 720. 

 concentration, (28) 28; (34) 323, 419, 721; (37) 

 116; (38) 16. 

 solution, concentration — 



as affected by sterOization, (37) 719. 

 relation to biological activities, (39) 323. 

 relation to plant growth, (33) 223. 

 solution- 

 effect on plant diseases, (26) 826. 

 e.\traction, (38) 803. 

 flocculation studies, (30) 623. 

 freezing-point, (38) 16, 813. 

 intake by plants, (35) 825. 

 membrane for studying, (40) 718. 

 method of obtaining, (30) 624; (31) 317; (32) 



29; (33) 322; (36) 720. 

 monograph, (28) 320. 

 movement of salts in, (39) 323. 

 nature, (33) 322. 

 notes, (27) 819. 



obtained by hydraulic action, (38) 512. 

 obtained by oil pres.sure method, (37) 717; 



(39) 20. 

 physiological balance, (39) 419. 

 plants as indicators of relative density, 



(29) 212. 

 preparation, (29) 203. 



protective effect on soil organisms, (34) 732. 

 relation to plant physiology and distribu- 

 tion, (26) 422. 

 role in plant nutrition, (28) 321. 

 studies, (30) 516; (40) 512, 718. 

 studies, lysimeter in, (28) 28. 

 treatise, (26) 122. 

 specialists, tiaining, (40) 300. 

 studies, (27) 118; (36) 618. 

 Studies— 



and teaching, methods and aims, (30) 512. 

 botanical method, (37) 515. 

 drainage tanks for, (37) 799. 

 factors in, (37) 18. 

 in United States, (27) 117. 

 in various countries, (27) 320. 

 methods, (31) 514. 

 outline, (32) 494. 



theory of antagonism of salts in, (30) 98. 

 surfaces, penetration by rain, (29) 426. 

 survey in Alabama — 

 Barbour Co., (37) 621. 

 Bullock Co., (34) 210. 

 Clay Co., (36) 511. 



Soil— Continued. 



survey in Alabama — continued. 

 Cleburne Co., (34) 119. 

 Dale Co., (29) 16. 

 Escambia Co., (34) 210. 

 Lawrence Co., (34) 615. 

 Limestone Co., (34) 717. 

 Lowndes Co., (40) 216. 

 Monroe Co., (40) 419. 

 Pickens Co., (38) 512. 

 Pike Co., (29) 16. 

 Russell Co., (34) 119. 

 Walker Co., (35) 624. 

 Washington Co., (38) 214. 

 Wilcox Co., (39) 20. 

 survey in Alaska, &4) 209. 

 suivey in Alaska, Kenai Peninsula region, (40) 



813. 

 survey in Arkansa.s— 

 Ashley Co., (31) 813. 

 Columbia Co., (34) 717. 

 Craighead Co., (38) 513. 

 Hempstead Co., (38) 812. 

 Jefferson Co., (36) 20. 

 Mississippi Co., (3.5) 17. 

 Pope Co., (34) 119. 

 Yell Co., (36) 618. 

 survey in California— 



Healdsbuig area, (37) 810. 

 Honey Lake area, (38) 214. 

 Livermore area, (29) 17. 

 Lower San Joaquin Valley, (40) 118. 

 Madera area, (29) 17. 

 Merced area, (35) 117. 

 Pasadena area, (38) 215. 

 Red Bluff area, (29) 17. 

 Riverside area, (38) 421. 

 Sacramento Valley, (34) 120. 

 San Diego region, (39) 210. 

 San Fernando Valley area, (38) 621. 

 San Francisco Bay region, (36) 721. 

 Ukiah area, (36) 420. 

 survey in Colorado, Uncompahgre Valley area, 



(29) 17. 

 survey in Delaware, New Castle Co., (37) 211. 

 survey in Florida, (28) 31. 

 survey in Florida- 

 Bradford Co., (31) 813. 



Fort Lauderdale area, (34) 210. 



Franklin Co., (36) 114. 



Hernando Co., (34) 211. 



HUlsborough Co., (39) 211. 



Indian River area, (34) 211. 



Pinellas Co., (32) 26. 



Putnam Co., (34) 717. 

 survey in Georgia — 



Brookfe Co., (39) 211. 



Bulloch Co., (29) 16. 



Clay Co., (35) 421. 



Colquitt Co., (34) 417. 



Crisp Co., (38) 215. 



Dekalb Co., (34) 417. 



Gordon Co., (31) 814. 



Habersham Co., (32) 513;[(37) 211. 



Jackson Co., (34) 417. 



Jasper Co., (39) 512. 



Jeff Davis Co., (32) 317. 



Jones Co., (32) 513. 



Laurens Co., (35) 811. 



Meriwether Co., (38) 718. 



Miller Co., (31) 814. 



Polk Co., (35) 508. 



Richmond Co., (38) 718. 



Stewart Co., (34) 120; (36) 721. 



Sumter Co., (29) 16. 



Talbot Co., (32) 513. 



Tatnall Co., (34) 510. 



Terrell Co., (34) 211. 



Troup Co., (35) 811. 



Turner Co., (35) 421. 



Walker Co., (29) 16. 



Washington Co., (36) 420. 



Wilkes Co., (36) 420. 

 survey in Idaho, Latah Co., (37) 21. 

 survey in Illinois — 



Bond Co., (33) 21. 



Du Page Co., (37) 720. 



Edgar Co., (37) 514. 



Kane Co., (38) 718. 



Kankakee Co., (36) 20. 



