1918] 



INDEX OF SUBJECTS. 



987 



Sodium — Continued. 



nitrate — continued. Page. 



fertilizing value, Pa 220, 244 



fertilizing value, S.C 517, 816 



fertilizing value, Tenn 212 



fertilizing value, U.S.D.A_ 422 



for pineapples, P.R 748 



Bale and distribution, 



U.S.D.A 625 



use on peat soils 132, 433 



salts, therapeutic value 585 



sulphid, effect on cement G91 



Softwood lumber industry in Middle 



West, U.S.D.A 847 



Soil- 

 abrasion by storms in Russia 145 



acidity, correction 819 



acidity, determination 419 



acidity, determiuation, U.S.D.A_ 720 



acidity, investigations, U.S.D.A- 511 



acidity, notes, Ohio 298 



acidity, relation to green ma- 

 nures. Pa 20 



acidity, studies. Pa 20 



bacteria as affected by arsenic_ 322 

 bacteria as affected by magne- 

 sium and calcium salts, 



U.S.D.A 818 



bacteria, coli-like, studies 19 



bacteria, nitrogen-fixing, studies 428 



erosion in Kansas 422 



extract as a criterion of pro- 

 ductivity, U.S.D.A 812 



extract as affected by season 



and crop growth, U.S.D.A— 813 



fertility, improvement, Ohio 219 



fertility, maintenance 119 



fertility under trees 816 



fertility work in Rhode Island 325 



flora, studies 514 



microorganisms, nitrate trans- 

 formation by 723 



moisture, effect on plant asso- 

 ciations 425 



moisture, effect on winterkilling 



of cereals 415 



moisture, loss through percola- 

 tion, evaporation, and trans- 

 piration, U.S.D.A 418 



moisture minimum, dynamic, de- 

 termination 719 



moisture, relation to apple spot 



diseases, U.S.D.A 753 



moisture, relation to orange 



growth 541 



moisture, studies. Mo 620 



moisture under dry farmlrg, 



Utah 319 



moisture under Irrigation, Utah_ 320 

 nitrates as affected by weeds-- 814 

 permeability, relation to irriga- 

 tion "788 



physics and management, text- 

 book 598 



solution, concentration, Mich-_ 16 



solution, extraction 803 



solution, freezing point, Mich- 16 



Soil — Continued. Page. 



solution, freezing point, U.S. 



D.A 813 



solution obtained by hydraulic 



action 512 



temperature, effect on seedling 



corn 530 



toxins and nitrification, studies. 322 

 ''oil survey In — 



Alabama, Pickens Co., U.S.D.A- 512 

 Alabama, Washington Co., U.S. 



D.A 214 



Arkansas, Craighead Co., U.S. 



D.A 513 



Arkansas, Hempstead Co., U.S. 



D.A 812 



California, Honey Lake area, 



U.S.D.A 214 



California, Pasadena area, U.S. 



D.A 215 



California, Riverside area, U.S. 



D.A 421 



California, San Fernando Val- 

 ley area. U.S.D.A 621 



Georgia, Crisp Co.. U.S.D.A--. 215 

 Georgia, Meriwether Co., U.S. 



D.A 718 



Georgia, Richmond Co., U. S. 



D.A 718 



Illinois, Kane Co., Ill 718 



Indiana. Benton Co., U.S.D.A-. 215 



Iowa. Bremer Co.. Iowa 18 



Iowa, Scott Co., U.S.D.A 215 



Maryland, Howard Co.. U.S.D.A. 621 

 Nebraska, Dawes Co., U.S.D.A. 216 

 Nebraska, Fillmore Co., U.S. 



D.A 812 



Nebraska, Kimball Co., U.S.D.A. 719 

 New York, Cortland Co., U.S. 



D.A 216 



North Carolina, Columbus Co., 



U.S.D.A 216 



North Carolina, Harnett Co., 



U.S.D.A 323 



North Carolina, Hertford Co., 



U.S.D.A 216 



North Dakota, Bottineau Co., 



N.Dak 621 



North Dakota, Bottineau Co., 



U.S.D.A 422 



Oklahoma, Kay Co., U.S.D.A. __ 621 

 Texas, San Saba Co., U.S.D.A.- 422 

 Wisconsin, north-central area, 



U.S.D.A 324 



Wisconsin, Portage Co., U.S. 



D.A 216 



Wisconsin. Wood Co., U.S.D.A. 217 

 Soiling crops, culture on moorland- 132 

 Soils — 



alkali, drainage 591 



alkali, of San Luis Valley, 



Colo 324, 386 



alkali, reclamation 815 



alkali, reclamation, U.S.D.A 118 



and soil management, course In 897 

 as affected by fairy-ring fungi, 



U.S.D.A 222 



