Index 



Scirtothrips citri, 292. 



Scudderia furcata, 292. 



Seasonal variation, effect of, on soils 

 267. 



Sea water, 136. 



Sharp, L. T., acknowledgment, 166. 



Shaw, C. F., acknowledgment to, 26. 



Skive's three salt nutrient solution 

 1 42. 



Shreve, Edith B., cited, 40, 311, 327. 



Skinner, J. J., and Schreiner, O., 

 cited on ion absorption, 139. 



Smalley, H. R., cited, 1.17. 



Sodium carbonate, 139. 



Sodium chloride, experiments with on 

 wine yeast, 66, 74, 81, 87-90, 90- 

 92, 94-100, 101; used in study of 

 antagonism and cell permeability, 

 139. " 



Sodium sulphate, 139, 271-282. 

 Soil, solubility of constituents of, as 

 affected by CaC0 3 or CaS0 4 

 treatment, 271 ; accepted views on 

 soil-salt phenomena, 271-273; ex- 

 periment of adding CaCO- and 

 CaS0 4 , 273-278; soils usedi 273- 

 274; results of experiment on 

 Oakley blow sand, 274, 275, 276, 

 on Berkeley clay adobe soil, 276- 

 277, on greenhouse soil, 277-278; 

 factors in determining results, 

 278-279; significance of variation 

 in the soils, 279-281; summary, 

 281-282. See also Moisture con- 

 ditions, Optimum, etc.; Variabil- 

 ity in soils, etc. 

 Soil classification, deevlopment of, 



371-376; value of, 476. 

 Soil Solution, A New Method of Ex- 

 tracting, 131; experiments, 131- 

 132; discussion of the direct pres- 

 sure method, 132-134. 

 Soil temperature, influence of, on 

 growth, 324-326, 330; means of. 

 reduction of, 330. 

 Soils Mapped under a Given Type 

 Name by the Bureau of Soils 

 Method, Are They Closely Similar 

 to One Another? 369; plan of 

 the study, 376-377; methods and 1 

 technique, 483-489; discussion of 

 results, 377-467: types and locali- 

 ties of soils studied (which also 

 see), 468; field notes on soil 

 samples, 490-498. 

 Mechanical analyses of the soil 

 samples. 380-395, 4N.1-4S6; tex- 

 tures, 386-387; loss on ignition, 

 405-470; moisture equivalents, 

 391-394, 469, 486; hydroscopic 

 coefficient, 394, 395, 469; com- 



parisons of physical data. 468- 

 1:69; physical relations, 481. 



Chemical data, 395-414, comparison 

 of, 470-472; chemical methods, 

 4S6-487; chemical relations, 481. 



Bacteriological data, 414-431. com- 

 parisons of, 472; bacteriological 

 methods, is, iss; bacteriological 

 relations, ls2. 



Greenhouse data, 432-467; green- 

 house cultures, 475-476, 482, 488, 



189. 



Solubility of the Soil's Constituents, 

 Does CaCO ;; or CaS0 4 Treatment 

 Affect?, 271. See also Soil, solu- 

 bility of constituents of, etc. 

 Soutli Africa, 1, 8. 

 Starch in abscission zone in Citrus, 



421. 

 Stoma, in Citrus, relation to transpir- 

 ation, 395, 26, 328; figures of, 

 326, 327. 

 Straw mulches, effect of, on setting 

 of Washington Navel oranges, 

 330-331. 

 Sugar, in grapes, 126, 127, 129, 130. 

 Sulphur content in soil solutions, 282. 



dioxide. 294, 295. 

 Sultana crops, figure showing, 121. 

 Sultanina crops, figure showing, 122. 

 Summer cover crop, beneficial effect 



of, 230. 

 Sumatra, 283. 

 Synthetic solution, 66. 

 Szucs, J., work of, on antagonisms of 



salts in plants, 138. 

 Teague, C. C, acknowledgment to, 31. 

 Temperature, air, effect on abscission, 

 292; soil, influence on plant 

 growth, 324-326, 330. 

 Thompson, H. S., cited, 271. 

 Timber, a new dendrometer for esti- 

 mation of, 55. See also Dendro- 

 meter, A New. 

 Tokay grapes, figure showing, 118, 122. 

 Toowoomba grass, 1. 

 Toxic action of simple salts upon 



plants, 64. 

 Toxic and antagonistic effects of salts 

 on wine yeast (Saccharomvces 

 ellipsoideus), 63, 70, 71, 7:;,' 74, 

 75. 

 Transpiration, 40, 50, 52; stoma and, 



295, 326, 328. 

 Traumatic stimuli leading to abscis- 

 sion. 291. 

 True, R. H., and Bartlett, II. II.. cited, 

 on effect of salts on plant pi 

 ology, 139. 

 U. S. Bureau of Soils, system of soil 

 mapping, 370, 375 376, 383, 17:: 

 175, 4 77 ISO. 



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