AGRICULTURAL INDEX 



875 



Soils — Experiments — Continued 



Soil solution obtained by the oil pressure 

 method. J. F. Morgan, bibliog il Mich Ag 

 Exp Tech B 28:1-38 '16; Same. Mich Ag Bd 

 Rep 1917:497-529; Same cond. Soil Sci 3: 

 531-45 Je '17 



See also Dilatometers; Freezing points; 

 Soil samplers; Soil sampling 



Gas content 

 See Soil gases 



Iron content 

 Use of iron in agricultui-e. A. Monnier and L. 

 Kuczyaski. Int R Sci & Prac Ag 8,no 5: 

 693-5 My '17 



Nitrogen content 



Changes in the nitrogen content of stored 

 soils. W: A. Aldrecht. bibliog Am Soc Agron 

 J 10:83-8 F '18 



Cylinder experiments relative to the utiliza- 

 tion and accumulation of nitrogen. J. G. 

 Lipman and A. W. Blair, il N J Ag Exp 

 B 289:1-88 '16 



Comparative study of the nitrogen economy 

 of certain Tennessee soils. C. A. Mooers. 

 Tenn Ag Exp B 118:127-87 '17 



Effect of heat on some niti'ogenous consti- 

 vients of soil. R. S. Potter and R. S. Snyder, 

 bibliog Soil Sci 5:197-212 Mr '18 



Efl'ect of prolonged growing of alfalfa on the 

 nitrogen content of the soil. C. O. Swanson. 

 Am Soc Agron J 9:305-14 O '17 



Further studies of the nitric nitrogen con- 

 tent of the country rock. R. Stewart and 

 W: Peterson, il Utah Ag Exp B 150:1-20 

 '17 



Maintaining the nitrogen supply of the soil. 

 A. W. Blair, il N J Ag Exp B 305:1-16 '17 



Nitrification and total nitrogen as affected by 

 crops, fertilizers, and copper sulfate. C: A. 

 Jensen. Am Soc Agron J 8:10-22 Ja '16 



Nitrogen distribution of fibrin hydrolyzed in 

 the presence of ferric chloride. C. A. Mor- 

 row and W. R. Fetzer. bibliog Soil Sci 5:163- 

 7 F '18 



Nitrogen supply of the soil. A. R. Whitson 

 and H. B. Hendrick. U S Ag B 355:41-6 '16 



Nitrogen: what it is and how to get it. T. 

 Butler. Prog F 31:179 F 5 '16 



Nitrous nitrogen in irrigated soils. J. E. 

 Greaves and others, il Soil Sci 3:149-54 P '17 



Organic matter of the soil; a study of the 

 nitrogen distribution in different soil types. 

 C. A. Morrow and R. A. Gortner. bibliog Soil 

 Sci 3:297-331 Ap '17 



Organic matter of the soil: a study of carbon 

 and nitrogen in seventeen successive ex- 

 tracts; with some observations on the na- 

 ture of the black pigment of the soil. R. A. 

 Gortner. bibliog Soil Sci 2:539-48 D '16 



Organic nitrogenous compounds in peat soils. 

 C. S. Robinson and E. J. Miller, il Mich Ag 

 Exp Tech B 35:1-29 '17 



Protein decomposition in soils. E. C. Lathrop. 

 bibliog Soil Sci 1:509-32 Je '16 



Relation of bacterial transformations of soil 

 nitrogen to nutrition of citrous plants. K. F. 

 Kellerman and R. C. Wright, bibliog J Ag 

 Research 2:101-13 My '14 



Relation of the transformation and distribu- 

 tion of soil nitrogen to the nutrition of ci- 

 trus plants. I. G. McBeth. bibliog J Ag Re- 

 search 9:183-252 My 14 '17 



Soil reaction and the growth of azotobacter. 



P. L. Gainey. J Ag Research 14:265-71 Ag 



12 '18 

 Soluble nonprotein nitrogen of soil. R. S. Pot- 

 ter and R. S. Snyder. J Ag Research 6:61-4 



Ap 10 '16 

 Total nitrogen and carbon in cultivated land 



and land abandoned to grass and weeds. 



A. W. Blair and H. C. McLean, bibliog Soil 



Sci 4:283-92 O '17 

 See also Nitrification 



Phosphorus content 

 Determination of phosphorus in soils. H. A. 



Noyes. Assn Offic Ag Chem J 3:149-51 My '17 

 Determination of soil phosphorus. C. O. Rost. 



bibliog Soil Sci 4:295-311 O '17 



Distribution of phosphorus in a vertical sec- 

 tion of bluegrass soil. A. M. Peter. Soil Sci 

 2:387-93 O '16 



Does vanadium interfere with the determina- 

 tion of phosphorus in soils when the phos- 

 phorus is weighed as magnesium pyrophos- 

 phate? R. A. Gortner and W: M. Shaw, 

 bibliog Soil Sci 2:299-304 S '16 



Organic phosphorus of soil., R. S. Potter and 

 T. H. Benton, bibliog Soil Sci 2:291-8 S '16 



Phosphorvis and potassium of soils. A. R. 

 Whitson and H. B. Hendrick. U S Ag B 

 355:47-54 '16 



Reactions of the phosphorous of the thick- 

 ened root of the flat turnip. B. L. Hartwell 

 and others, bibliog J Ag Research 11:359-70 

 N 19 '17 



Vertical distribution of phosphorus in the 

 surface soil of prairies. F: J. Alway and 

 C. O. Rost. bibliog Soil Sci 2:493-7 N '16 

 See also Phosphates 



Potassium content 



Phosphorus and potassium of soils. A. R. 

 Whitson and H. B. Hendrick. U S Ag B 355: 

 47-54 '16 



Solubility of the soil potash in various salt 

 solutions. D. K. Tressler. bibliog Soil Sci 

 6:237-57 S '18 



Protein content 



See Proteins 



Sampling 

 See Soil sampling 



Study and teaching 

 Extension course in soils for self-instructed 

 classes in movable schools of agriculture. 

 A. R. Whitson and H. B. Hendrick. U S 

 Ag B 355:1-92 '16 

 Soils courses at the Iowa state college. P. B. 

 Brown. Am Soc Agron J 8:42-7 Ja '16 



Sulfur content 

 Divergent effects of lime and magnesia upon 



the conservation of soil sulfur. W. H. Mac- 



Intire and others, il Soil Sci 4:231-7 S '17 

 Loss of sulphur in drainage water. T. L. Lyon 



and J. A. Bizzell. Am Soc Agron J 8:88-91 



Mr '16 

 Relation of sulfur to soil productivity. F. L. 



Duley. Am Soc Agron J 8:154-60 My '16 

 Sulfur content of some typical Kansas soils, 



and the loss of sulfur due to cultivation. 



C. O. Swanson and R. W. Miller, bibliog 



Soil Sci 3:139-48 F '17 

 Sulphur in relation to soils and crops. J. W. 



Ames and G. E. Boltz. bibliog Ohio Ag Exp 



B 292:221-56 '16 



See also Sulfoflcation; Sulfur as fertilizer 



Testing 



Soil tests in Missouri. R. R. Hudelson. Mo Ag 



Bd Yearbook 1917:225-6 

 Spotting slacker soils, il Scientific Am (233 

 Broadway, N.Y. 10c) 117:500 D 29. '17 

 See >also Litmus paper 



Translocation 

 Movement of soluble salts through soils. 

 M. M. McCool and L. C. Wheeting. J Ag 

 Research 11:531-47 D 10 '17 



Alabama 

 Preliminary soil census of Alabama and west 



Florida. R. M. Harper, map Soil Sci 4:91- 



107 Ag '17 

 Soil survey of Barbour county, Alabama. 



H. C. Smith and others. (Soils bur. advance 



sheets) 50p map '16 U S Ag 

 Soil survey of Pickens county, Alabama. 



A. M. O'Neal, jr., and others. (Soils bur. 



advance sheets) 41p maps '17 U S Ag 

 Soil survey of Washington county, Alabama. 



L. A. Hurst and others. (Soils bur. advance 



sheets) 51p il map '17 U S Ag 

 Arkansas 

 Soil survey of Craighead county, Arkansas. 



E. B. Deeter and L. V. Davis. (Soils bur. 



advance sheets) 32p il maps '17 U S Ag 



