522 



INDEX 



PAGE 



Loess, composition of 63 



Physical characters of 61 



Relation to wind formation. ... 60 

 Soil, extent of 61 



Loose top soil absorbs rainfall. . . .217 



Loss of nitrates from soil 418 



Water from soil 164 



Loughridge, table, composition 



soil separates 85 



Low-grade fertilizers 343 



Macro-organisms of the soil 38S 



Maintenance of organic matter. . .131 

 Magnesium, as plant food element . 3 



Magnesium, relation to lime 350 



Management of dust mulch 205 



. External factors in 463 



\ Mulches, summarized 210 



Soil and texture 80 



Soil moisture, highest type of. .238 



Manures 319 



Manure, early ideas of function . . . 320 

 As affected by food of animal . . .373 

 As affected by use of animal. . . .374 

 As affected by age of animal . . . .373 



Composting 380 



Conservation of ammonia 376 



Deterioration of 375 



Different classes 322 



Effect on volume and movement 



of soil air 444 



Factors affecting value 373 



Farm, formation of ammonia. . .376 



Farm, loss of free nitrogen 377 



Fermentations of 375 



For cereal crops 295, 387 



For grass crops 295 



For leguminous crops 290 



For root crops 296 



For vegetables 296 



From animals, relative values. .371 



From poultry 372 



From sheep 3 1 1 



From swine 370 



From the cow 369 



From the farm 363 



From the horse 368 



Function of 3S4 



Green 3S4 



Green, leguminous crops 3S5 



In maintaining humus 132 



Leaching 377 



Litter 367 



PAGE 



Manure, methods of handling . . . .379 



Nutrient function 320 



Place in crop rotation 383 



Produced by different animals . . 368 

 Relation to soil moisture supply 221 



Sawdust 368 



Solid excreta 364 



Straw as litter 367 



Urine 366 



Use of in dry farming 383 



Mass of soil 2 



Marine soils 46 



Marine soils, composition of 49 



Marl, associated with cumulose 



soil 43 



Maximum capillary efficiency .... 172 



Moisture content 155 



Water capacity 161 



Materials, coloring in soil 101 



Mead, number of methods of apply- 

 ing water 229 



Means of decreasing soil moisture . 238 



Methods of applying fertilizers. . . .347 



Applying water in irrigation .... 229 



Handling manure 379 



Mechanism of the soil 2 



Mechanical action of water in rock 



decay 24 



Analysis defined 70 



Decay, of rocks, disintegration . . 14 

 Support by soil as factor in plant 



growth 1 



Meeker harrow, efficiency of 484 



Merrill, composition of residual 



soils 33 



Example of atmospheric disin- 

 tegration 18 



Examples of expansion of rock. . 20 

 Method of calculating loss of 



rocks in decay 31 



Table, composition soil separates 84 



Metamorphic rocks 11, 14 



Micro-organisms, plant 392 



Micro-organisms in the soil 391 



Miners' inch, defined 228 



Minerals, characteristics of 8 



Absorbed by crops 291 



Amounts removed by crops. . . .2S1 

 Composition of important soil 



forming 5 



Constituents of soil, absorption 



by roots 279 



Deficiency 273, 280 



