274 



INDEX 



Cottonseed meal 132 



Cow manure 152 



Crop residue 239 



Cultivation after rains 33 



shallow surface 31 



Davy, work of 3 



Dissolved bone 1 83 



Distribution of soils 54 



Denitrification 123 



De Saussure, work of 3, 104 



Drainage 41, 43 



Dried blood 1 28 



Dyer 80 



Early truck soils 19 



Electricity of soil 47 



Evaporation 30 



Excessive use of fertilizers 222 



Experiments 259 



Fallow fields 126 



Fall plowing 35 



Farm manures 141, 171 



Farm manures and commercial 



fertilizers 224 



Feldspar 55, 209 



Fermentation of manures 158 



Fertility, conservation of 249 



removed in crops 227 



Fertilizers, amount to use 222 



influence upon soil water. 39 



on barley 231 



on wheat 230 



Field tests with fertilizers 218 



Fine earth 12 



Fish fertilizer 132 



Fixation 1 38 



Flax, food requirements of 233 



soils 20 



Flesh meal 131 



Forest fires 97 



Formation of soils 49, 54 



Form of soil particles 14 



Fruit soils 20 



Gains, of humus 100 



of nitrogen 117 



Glaciers, action of 51 



Grain soils 22 



Granite 58 



Grass lands, fertilizers for 236 



Grass soils 22 



Guano 181 



Gypsum and manure 161 



Heat and crop growth 44 



produced by manures 160 



of soil 42, 43 



Heiden 156, 161 



Hellriegel 25, 30, 109 



Hen manure 154 



Hog manure 154 



Hops, fertilizers for 236 



Horse manure 152 



Human excrements 156 



Humates 91 



as plant food 95 



Humification 92 



Humic acid 98 



Humic phosphates 92, 184 



Humus 91 



active and inactive 100 



causes fixation 139 



composition of 94 



Income and outgo of fertility.. 



250, 253 



Injury of coarse manures .-40, 164 

 Insoluble matters of soils- • • • 70, 71 

 Iron compounds of soil 68 



Kainit 190, 206, 212 



Kaolin 58 



King 32, 35, 36 



Lawesand Gilbert.. 7, 107, 229, 230 



Leached ashes 192 



Leaching of manure 157 



Leather ... 133 



Leguminous crops, fertilizers for, 237 

 as manure 134 



