650 



INDEX 



Irrigation, in India, 333, 583 



possible in the United States, 583 



Japan, agricultural practices, 594 

 Jethro Tull's soil-fertility theories, 300 



Kainit, 530, 535 



Kansas, crop yields (see also statistics), 330 



soils, 138 

 Kentucky, pot-culture experiments, 288 



soils, 64, 65, 92, 138 

 King, on Japanese agriculture, 594 



on water-soluble plant food, 142 

 Kossowitsch, availability of raw phosphate, 

 109 



Land-plaster, 256, 420, 505, 533 



Land reclamation possible in United States, 



583 



Land values, 586 

 Law, constant proportions, 8 



diminishing returns, 374 



gas, 7 



governing sale of fertilizers, 599 



periodic, 9 



solution, 366 

 Lawes and Gilbert, source of nitrogen for 



plants, 307 

 Leaching, rocks, soils, 49, 51, 174, 413, 556 



plants, 549 

 Lecithin, 40 

 Legume plants, composition, 154, 218, 604 



inoculation, 210, 218 



nitrogen fixation, 207 



tops and roots, 218 

 Legume seeds, composition, 154, 603 

 Liberation of plant food, 109 

 Liebig's soil-fertility theories, 308 

 Liebig's view of agriculture, 591 

 Life, 29 



Life of soil, 195 



Light factor in crop production, 576 

 Lime and ground limestone, 165 

 Lime burning, 27 

 Limestone, amount to apply, 172 



how to apply, 179 



loss by leaching, 51, 174 



magnesian, or dolomitic, 169 



soils, 123, 147 



spreader, 179 



time to apply, 178 



use in soil improvement, 160 

 Limiting factors in crop production, 435, 



575 



Lincoln's view of agriculture, 592 

 Lipman, on dentrification, 439 

 Live stock destroy food values, 234 



organic matter, 199 

 Live-stock farming, 231, 459 



Loess, characteristics, 54 



composition, 69 



in United States, 68 

 Loessial soils, 123, 144, 634 

 Losses of plant food, from manure, 200, 

 546, 547 



from plants, 549 



from soils, 411, 413, 556 

 Louisiana, field experiments, 495 



soils, 96, 138 



Machine for spreading limestone and 



phosphate, 179 

 Magnesian limestone, 169 

 Magnesium, 42 

 Magnesium determination, 633 



in fertilizer experiments, 171, 364 

 Maine field experiments, 275 

 Maintenance rations, 33 

 Manganese, 44 

 Manganese separation, 633 

 Mangel-wurzel, composition, 402 



field experiments, 400 

 Mann, on the use of raw phosphate, 504 

 Manure, losses from exposure, 200, 256, 

 5 8 > 546, 547 



preservatives and reenforcing materials, 



256, 547 



recovered in live-stock farming, 201 

 Manure in culture experiments, 256, 343 

 Manures (see farm manure and green 



manuring) 



Marl carbonates, 167 

 Marl phosphates, 241 

 Maryland, field experiments, 261 



soils, 138, 141 



subsoils, 73 



Massachusetts field experiments, 278 

 Mellilotus for green manuring, 220 

 Mica, 49 



Michigan, investigations with legume 

 plants, 216, 221 



soils, 97 

 Minnesota, soil experiments, 499 



soils, 100, 138 

 Mississippi soils, 93 

 Missouri soils, 89, 138 

 Moisture factor in crop production, 577 

 Molecule, defined, 4 

 Montana soils, 102 

 Mountain soils, 122, 128 



Nascent, defined, 4 



National Fertilizer Association report on 



raw phosphate, 292 

 Nebraska rainfall, 331, 580, 582 



soils, 89 

 Nevada soils, 102 



