2 go 



INDEX 



Fertilizers, amount to use- . -212 

 influence upon soil 



water 37 



on barley 213 



on wheat 213 



Field tests with fertilizers . . . 208 



Fine earth 1 1 



Fish fertilizer 125 



Fixation 160 



of ammonia 161 



due to zeolites 160 



nitrates not fixed 161 



and available plant 



food 162 



Flax, food requirements of. .222 



soils 19 



Flesh meal 124 



Forest fires 92 



Formation of soils 45, 50 



Form of soil particles 14 



Fruit soils 18 



Fruit trees, fertilizers for. . -228 



Gains of humus 95 



of nitrogen in 



Garden crops, fertilizers for- 226 

 Geological study of soil, 



value of 56 



Glaciers, action of 47 



Grain soils 19 



Granite 54 



Grass lands, fertilizers for- . .225 



Grass soils 19 



Guano 172 



Gullying of soils 255 



Gypsum and manure 149 



Hay land, fertilizing 225 



Heat and crop growth 41 



produced by manures. 148 

 of soil 39-40 



Heiden 145, 150 



Hellriegel 22, 28, 105 



Hen manure 143 



Hog manure 143 



Hops, fertilizers for 225 



Hornblende 52 



Horse manure 142 



Human excrements 145 



Humates s 87 



as plant food 90 



Humification 87 



Humic acid 94 



Hutnic phosphates 88, 176 



Humus 87 



active and inactive 95 



causes fixation 161 



composition of 90 



extraction of, from 



soils 270 



loss of, from soils 92 



soils in need of 94 



Hydroscopic moisture 26 



determination of 262 



Importance of field trials 211 



Income and outgo of fertil- 

 ity 242-245 



Infected seed and soil dis- 

 eases 256 



Inherent fertility 259 



Injury of coarse manures. 38, 152 



Inoculation of soils 119, 253 



Insoluble matters of soils-67-68 

 Iron compounds of soil 65 



Kainit 180, 204 



Kaolin 54 



King 31. 33, 34 



Laboratory note book 261 



practice 262-274 



