256 



INDEX 



Shrubs, 218, 219 



Shutt, F. T., 8, 15, 54, 59, 118, 204, 



206, 211, 212, 217, 223 



Sigmond, A., von, 15, 45, 59 



Silt basins, 188 



Sims, C. E., 90, 176 



Size of drains, 178, 181, 182 



Skinner, W. W., 104 



Slossom, E. C, 32, 40, 45, 51, 59, 



239 

 Smith, E. A., 15, 206, 211, 223 

 Smith, J. G., 222 

 Snow, F. J., 15 

 Sodium: 



determination of, 93 

 bicarbonate, formation of, 106 

 carbonate: 



hardpan, 127 

 neutralizing of, 160 

 solubility, 105 

 chloride, solubility, 105 

 nitrate, solubility, 105 

 sulphate, experiments in Cali- 

 fornia, 108 

 sulphate, solubility, 105 

 Soil: 



analysis of, 1 2 



bacteria, antagonistic results 



with, 116 

 composition in judging land, 



243 

 extract, 81 



fertility and organisms, 132 

 indicated by plants, 60 

 movement of alkali through, 141 

 organisms and fertility, 132 

 physical condition of, 119 

 solution, equilibrium in, 111 

 solution, preparation of, 81 

 solution, variance in concentra- 

 tion, 112 

 warmed by drainage, 169 

 sterility and organisms, 133 



Soils: 



absorption of salts, 109 



Canadian, 114 

 Solids, determination of, 86 

 Soluble : 



salt movement with water, 142 



salts, movement of, 141 



salts by bridge, 94 



salts in hardpan, 127 

 Solubility: 



affected by temperature, 105, 

 109, 112 



of salts, 105, 106 

 Solution: 



experiments, 44 



Knop's^43 



nutrient, 43 



preparation of, 81 

 Solutions: 



alkali, 44 



nutrient, 43 



toxicity of, 43 

 Sorghums, 208 

 Source of: 



alkali determines methods, 154 



contamination, 154 

 Sources of water contamination, 225 

 South Africa, alkali in, 10 

 South America, alkali in, 10 

 Spike weed, as alkali indicator, 63, 



73 

 Stabler, H., 239 



Strahorn, A. T., 80, 211, 215, 239 

 Steik, K., 176, 190 

 Stevenson, W. H., 15 

 Stewart, J., 51, 123, 124 

 Stewart, R., 22, 30, 33, 104, 239 . 

 Straw to reduce evaporation, 157 

 Structure of: 



plants affected by alkali, 38 



soil, 119 

 Sugar-beets, 215 

 Sulphate determination, 89 





