344 



INDEX 



Comparison of sulphate of am- 

 monia and ni- 

 trate of soda, 265 

 ,, ,, sulphate and muri- 



ate of potash, 

 284 



Composts, 153 

 Compound manures, 287 

 Conductivity of soils, 81 

 Congelo, 260 

 Consolidation of soils, 53, 61, 72, 



81, 160 



Conservation of matter, 176 

 Contraction of soils, 88 

 Copperas, 199, 291 

 Coprolites, 212 

 Corn crops, manures for, 195 

 Cow dung, 306, 326 

 Craie-grise, 211 

 Crenic acid, 109 

 Crops, composition of, 169, 192 



classification of, 193 



effect of removing, 165 



garden, 197, 285 



,, requirements of, 192 



,, See Various crops. 

 Crude potash, 278 

 Crushed bones, 241 

 Crust of the earth, composition 



of, 23 



Cucumbers, manures for, 199 

 Cultivation, 42 

 Cyanamide, 271 



Cycle of changes, 164, 168, 175 

 Cystine, 154 



DALMARNOCK sewage works, 299 

 Decay, 151 



Decomposition of minerals, 128 

 ,, organic matter, 



138, 151 



Definition of manure, 178 

 Defloculation, 86 

 Dehydration, 132 

 Deliquescence, 59 

 Deltas, formation of, 27 

 Denitrification in farmyard man- 

 ure, 317 



,, ,, soils, 159 



Density of soils, 55 

 Denudation, 27 

 De-oxidation, 11 



Destruction of organic matter, 151 

 Detritus, 27 

 Dew, 58 

 Diffusion of gases in soil, 135 



,, salts in soil, 88 

 Dissolved bones, 243 



guano, 297 

 Dolomite, 37 



powder, 226 

 Double superphosphates, 218 

 Drain-gauges, 67 

 Drainage, influence on nitrifica- 

 tion, 160 



,, water, amount of, 68 



,, ,, composition of, 



98 



,, ,, nitrates in, 101 



Dried blood, 251 

 Drift materials, 18 



soils, 49 

 Dung, 300 



Dyer, analysis of manures, 326 

 soils, 124 



EARTH, composition of crust, 24 



fine, 91, 122 



,, worms, 41 

 Eight-plot test, 185 

 Elements, essential in plants, 8 

 Elutriation of soils, 91 



