352 



INDEX 



Shell sand, 32 



Shoddy, 251 



Shrinkage of soils, 88 



Sieve analysis of basic slag, 234 



soils, 50, 91 

 Silica in minerals, 20 



,, plants, 6, 169, 195 



soils, 59, 85, 129, 132 

 Silicates, 19, 107, 128, 195, 205 

 Silt, 28, 50 



Size of particles, 31, 34, 50, 91 

 Slag. See Basic slag. 

 Slaked lime, 118 

 Slate, 35 



Sludge manures, 299 

 Sodium salts in drainage, 98 



plants, 5, 6, 169 

 ,, ,, soils, 122. See also 



Nitrate of soda. 

 Soils, air of, 134 



,, absorption of gases by, 13, 



59, 161 

 ,, absorption of salts by, 100, 



105 



,, acidity of, 115 

 ,, alkaline, 114 

 ,, analysis of, chemical, 96, 



122, 191 

 ,, ,, ,, mechanical, 



88 



,, biology of, 137 

 ,, chemistry of, 96 

 ,, classification of, 42 

 ,, fertility of, 163 

 ,, formation of, 40 

 ,, manurial requirements of, 



182 

 ,, miscellaneous properties, 



of, 83 



,, nitrogen of, 161 

 ,, organic matter of, 2, 40, 

 108, 111, 151 



Soils, origin of, 18 



,, physical properties of, 50 

 , , sampling of, 89 

 ,, sour, 113 

 ,, temperature of, 74, 82 

 ., water of, 57, 96 

 Solar heat, 74 

 Solutionary rocks, 28 

 Somme phosphate, 211 

 Soot, 258 

 Sour soils, 113 



Sources of plant constituents, 7 

 South Carolina phosphates, 210 

 Spanish phosphorite, 210 

 Special manures, 203 

 Specific gravity of soils, 56 



,, heat of soils, 78 

 Sphagnum, 38 

 Spinach, manure for, 199 

 Stalactites, 112 

 Stassfurth salts, 279 

 Steamed bones, 242 

 Steel, Bessemer's process for, 224 

 Sterilisation, 140 

 Stiff land, 48 

 Stilbite, 22 



Stockbride on humus, 109 

 Storer on farmyard manure, 326 

 Stratification, 29 

 Straw as litter, 312 

 Strawberries, manure for, 200 

 Sulphate of ammonia, 253 

 ,, adulteration of, 255 

 ,, application of, 257 

 ,, compared with nitrate 



of soda, 265 



,, composition of, 255 

 ,, production of, 253 

 ,, manurial value of, 256 

 of iron, 199, 291 

 of potash, 281, 283 

 Sulphates in rain-water, 17, 179 



