23C 



Index 



Early crops, value of, 65 

 Earthing up, 88 

 Earthworms, effect on soil, 85 

 Economic factors in crop produc- 

 tion, 69 

 England, distribution of crops in, 72 

 English soils: some main groups, 



56 

 Eroded lands of Australia, 51 

 Explosives, use for cultivation, 91 



Fallowing, 89, 119 



Farmyard manure, 165; effect on 

 soil moisture, 181 ; on fertility, 

 183 ; comparison with artificials, 

 166; composition of, 172; losses 

 in storage, 171 ; time of appli- 

 cation, 185 



Feathers as manure, 200 



Feeding stuffs, manurial value of, 

 188 



von Feilitzen's experiments with 

 phosphatic fertilisers, 153 



Fen soils, 40, 123 



Fertilisers, annual consumption of, 

 217 



Fertility of the soil, 76, 94; condi- 

 tions governing, 10, 94 



Fibrous material in soil, value of, 37 



"Finger and toe," 120, 186, 219 



Fish guano, 193 



Flocculation, 22 



Flue dust as manure, 154, 202 



Folding, 37, 113 



Food supply and plant growth, 6 



Frost, effect in soil, 57 



Frosts, spring and autumn, 69 



Fruit soils, 69 



Gains in nitrogen and nitrate in 



soils. 45 

 Garforth experiments, 152, 162, 



163, 226 

 Gas lime, 226 



Grass land, manure for, 213 

 Grass land map, 68 

 Grass, suitability for clay land, 111 

 Greaves, 194 

 Green manuring, 63, 114 

 Guano, 191 



Gurney's cultivation experiment 82 

 Gypsum, 144, 176 



Hair as manure, 200 ' 



Hall and Miller, loss of calcium 

 carbonate from soil, 134 



Hall and Voelcker's tables for 

 manurial values of feeding stuffs, 

 188 



Hansen, experiments at Askor, 167 



Hendrick, experiments with phos- 

 phatic fertilisers, 152; on liquid 

 manure, 178; experiments with 

 nitrolim, 138; experiments with 

 seaweed, 197 



Hoeing, 87 



Hoofs and horns, 195 



Hopkins, Cyril, on loss of lime 

 from soil, 224 



Humus, 36; soluble, 38; physical 

 properties, 39 



Husbandry, schemes of, 104 



Hutchinson and MacLennan, effect 

 of lime and limestone on soil, 221; 

 determination of carbonates in 

 soil, 227 



Ichaboe guano, 192 



Irish Department of Agriculture, 



experiments with seaweed, 198; 



experiments with phosphatic 



fertilisers, 152 

 Iron compounds in soil, 28 

 Irrigation, 74 



Kainit, 163, 167 



Kjeldahl's method for determining 

 nitrogen, 228, 232 



Landlord and tenant, 103 



Laterite, 49 



Lawes and Gilbert, residual manu- 

 rial value, 186 



Lawes' invention of superphos- 

 phate, 142 



Leather scraps as manure, 201; 

 waste as manure, 201 



Leguminosee and nitrogen fixation, 

 44 



Lime as manure, 221 



Limestone as manure, 220, 225 



Limiting factors, 3 



Liquid manure, 177 



Litter, 169 



Loams, 116 



