AGRICULTURAL INDEX 



1015 



Soil fertility — Continued 



Idaho 

 Management of Palouse soils. P. P. Peterson. 



Idaho Ag Exp C 12 3p '20 

 Soil and climate factors in relation to crop 

 production on the Palouse silt loam of 

 Idaho. P. P. Peterson. Idaho Ag Exp B 118: 

 1-19 '19 



Illinois 



Illinois system of permanent soil fertility. 

 Wallaces' F 45:1726 Jl 9 '20 



lllinoi.*; system of permanent soil fertility as 

 developed by Cyril G. Hopkins. R. Stewart, 

 il HI Ag Exn C 245:1-20 '20 



Scientific basis of the Illinois system of 

 permanent soil fertility. R. Stewart. Sci- 

 ence (Science Press, Garrison, X.Y. 15c) 

 n s 52:21-5 Jl 9 '20 



India 

 Xitrogen fixation in Indian soils. C M. Hut- 



chin.son. Ag J of India 14:215-19 Ap "19 

 Nitrogenous fertilizers: their use in India. 



C. M. Hutchinson. Ag J of India 14:203-14 



Ap '19 



Indiana 

 Fertility and a money crop. I. J. Mathews. 



Successful F 19:13 S '20 

 Indiana soil fertility conference. Am Fert 55: 



35-48 Jl 30 '21 

 Purdue plan of soil bviilding. G. I. Christie. 



Am Fert 54:86+ Je 18; 55:79-f Jl 30; 52+ 



O 22; 43-4 N 19 '21 

 Results of greenhouse and laboratory re- 

 search in soil fertility. S. D. Connor. Am 



Fert 55:77-8+ Ag 13 '21 

 War beef and soil fertility. P. S. Richey. 



Breeder's Gaz 74:535 O 3 '18 



Iowa 

 Soil fertility and soil tenancy. G. Wilster. il 



Wallaces' F 45:858 Mr 12 '20 

 Soil treatment in Iowa. G. Wilster. Wallaces' 



F 44:2382 N 28 '19 



Kansas 



Effect of alfalfa on the fertility elements of 

 the soil in comparison with grain crops. C. 

 O. Swanson and W. L. Latshaw. bibliog 

 map Soil Sci 8:1-39 Jl '19; Summary and 

 conclusions. Ag Gaz of Canada 7:280-1 Mr 

 '20: Abstract. Exp Sta Record 42:425-6 Ap 

 •20 



Soil fertility and Kansas wheat. L. D. 

 Graham. Breeder's Gaz 77:1663 Je 17 '20 



Kentucky 

 Maintenance of fertility. G: Roberts and A. 

 E. Ewan. Ky Ag Exp B 228:121-31 '20 



Maryland 

 Possibilities in wornout land. A: Stabler. 

 Breeder's Gaz 76:94 Jl 17 '19 



Minnesota 

 Agjicultmal value and reclamation of !Minn- 



fsota peat soils. F. J. Alway. bibliog il maps 



Minn Ag Exp B 188:1-136 '20 

 Some notes on the cause of the nnproduc- 



tivity of raw subsoils in humid regions. 



P. R. McMiller. bibliog Soil Sci 7:233-6 Mr 



•19 



Netherlands 

 Researches on certain soil sicknesses in the 



Netherlands. N. L. Solmgen and others. Int 



R Sci & Prac Ag 9, no 6:659-62 Je '18 



New Hampshire 

 Is the soil being improved? A. B. Genung. 

 il Rural N Y 79:1368 Ag 28 ^20 



New 'York 

 Some observations on soil fertility and crop 

 production. J. D. Luckett. N Y State Ag 

 Exp B 473:Pop ed 1-18 '20 



New Zealand 

 Meadow top-dressing test at Marton. C. H. 

 Schwass. J Ag New Zealand 20:369-70 Je 

 •20 



North Carolina 

 Hand-fed crops. J. S. Gates, il map Country 

 Gent 85:10+ Ag 28 '20 



North Dakota 

 Crop rotation and .soil fertility. R. C. Done- 

 ghue. il N D Ag Exp B 126:197-251 'IS; Ab- 

 stract. Exp Sta Record 41, no 9:822-4 '20 



Ohio 



Facts concerning meadow fertility. I\I. A. 

 Bachtoll. il Ohio Ag Exp B y 5:121-4 Ap '20 



Keeping good soil good. F. E. Bear. Ohio 

 Ag Ext Timely Soil Topics 35 4p '21 



Mainterifinco of soil fertility; a quarter cen- 

 tury's woik with mnnure and fertilizer.'--, il 

 Ohio Ag Exp B 336:579-649 '19; Abstract. 

 Ag Gaz of Canada 7:705-6 Ag '20 



Maintenance of soil fertility in Hamilton 

 county, Ohio. C: E. Thorne. Ohio Ag Exp 

 B V 5:170-3 Je '20 



Ontario 



Maintaining and improving the fertility of 



the soils of Essex and Kent. R. Harcourt. 



(In Rep., Corn growers' as.sns., 1919, p. 24- 



31) il '20 Ontario Ag Dept 

 Soil fertility investigation in Ontario. R. S. 



Harcourt. Ag Gaz of Canada 8:634-5 N '21 



Oregon 



Biennial report, Oregon soil investigations, 

 1918-1920. 46p il map '21 Ore Ag Exp 



Rhode Island 

 Six years' experience in improving a light 

 unproductive soil. B. L. Hartwell and S. C. 

 Damon. Am Soc Agron J 13:37-41 Ja '21 



South Carolina 



Object lessons in soil building, il Farminc 19: 

 74-5 Ag '21 



Southern states 



Building up land. T. Butler. Prog F 35:179 

 Ja 24 '20 



Fertility maintenance in the cotton giowing 

 region. A. G. Smith. (B. 30) 12p n.d. South- 

 ern fertilizer assn.. Soil improvement com., 

 Atlanta, Ga. 



South's young and aged soils. J: R. Mc- 

 Mahon. il Country Gent 85:5+ Mr 20 '20 



Tennessee 



Soil fertility and tenanti-v seldom go to- 

 gether. E. Butler. Prog F 35:726 Ap 3 '20 



Texas 



Nature of soil fertility. G. S. Fraps. Am Fert 

 54:85+ Mr 26 '21 



United States 

 America's champion soil. J: R. McMahon. il 



map Country Gent 85:9+ Ap 3 '20 

 Inventaire et etude des sols. H.-M. Nagant. 



Sci Ag 1:47-8 Ja '21 

 Is a food shortage possible in the United 



States? two different interpretations of 



pei'manent soil fertility. Am Fert 55:42-4 



O 22 '21 

 Maintenance of soil fertility. G. S. Fraps. Am 



Fert 54:49-51 F 26 '21 

 Soil-fertility investigations. Am Fert 54:128 + 



Ja 29 '21 

 Some tendencies in soil fertility thought and 



research. W: D. Hurd. Am Fert 55:127-30+ 



Jl 2 '21 



Washington 



Management of several types of western 

 AVashington soils. M. E. McCollam. West- 

 ern Wash Ag Exp B v 9:67-71 N '21 



Soil flocculatlon 

 Flocculatibn of soils. N. M. Comber. J Ag 



Sci 10:425-36 O '20 

 Investigations into flocculating power in soil. 



G. Masoni and G. Leoncini. Int R Sci & 



Prac Ag 9,no 11:1285-6 N '18 



Soil fungi 

 Soil fungus kills heeled-in trees, il Pacific 



Rural Press 101:455 Mr 19 '21 

 Studies on the proteolytic enzymes of soil 

 fungi and actinomycetes. S. A. Waksman. 

 bibliog J Bact 3:509-30 N '18 



