INDEX 



429 



Drag, brush, use of, 173 

 Drainage capacity of tiles, 223 



direct benefits of, 193 



ditch, how to dig, 202 



for special crops, 195 



natural, 194 



poor, signs of, 190 



signs of need, 191 



warms the soil, 33 



when needed, 190 



Drainage system, avoid abrupt 

 curves, 217 



cost of, 229 



how to plan, 208 



map and drawing, 208 



outlet for, 209 



planning, 207 

 Draining, effect on soil, 196 



farm soils need, 194 



first cost large, 196 



lowers water-table, 198 



makes soil more moist, 197 



pot holes, 230 



practical results from, 199 



promotes aeration, 197 



reclaims swamps, etc., 193, 

 231 



slope an aid to, 195 



to improve texture, 192 

 Drains, box, 230 



brush, 230 



fall of, 211 



grade for, 207, 210 



kind to use, 200 



mole, 230 



pole, 230 



stone, 229 



surface, 200, 202 



tile, 201, 205, 217, 225 

 Dried blood, contents of, 378 

 Drift soils, how made, 12, 48 

 Drumlins, 12 

 Dry farming, 105 



crops under, 108, 238 



methods, 107 



secret of, 108 



Early crop, best slope for, 34 

 Earth being slowly levelled, 4 

 Earthworms as soil workers, 14 

 Electricity of the soil, the, 39 



increases yield, 39 

 Elements in rocks, 27 

 Elements in soils, 27 



Engines to pump water, 248 



cost of, 248 



Erosion causes loss of fertility, 286 

 checked by deep plowing, 295 

 directing water, 291 

 side-hill "ditches, 291 

 terracing, 291 

 underdrainage, 294 

 methods of checking, 288 

 on slope lands, 288 

 prevented by woodlands, 289 

 trees prevent, 289 

 Erosive action of sand, 19 

 Eucalyptus trees aid drainage, 78 

 Evaporation of water, 88, 93 

 Excretions, animal, value of, 316 

 Excretory theory of soil fertility, 3 18, 

 321 



Fallowing and soil fertility, 296 

 methods of, 298 

 to get rid of weeds, 298 

 to set free plant food, 297 

 to store water, 297 

 Fall plowing, 134 

 Farming, diversified, 315 

 dry, 105, 238 

 improvident, 343 

 single-crop, 310, 315 

 Farm irrigation, 233 

 Farm manures, 346 



analyses of, 422 

 Farm products, fertilising materials 



in, 423-425 



Farm soils, leading types of, 53 

 native plant food in, 419 

 test of water capacity, 93 

 Fertile air, 29 



Fertilisers, amount to apply, 397 

 advantages of home-mixed, 



376 

 artificial, are made of, 366 



growth of trade in, 365 

 bill of American farmers ex- 

 cessive, 364 

 calculating value of, from 



analysis, 373 

 commercial, as soil cleansers, 



321 

 commercial, when to apply, 



395 

 common way of testing, 390, 



391 

 cost of, 375 



