INDEX 



757 



Irrigation, erosion in canals, 694. 

 flooding, 699. 

 furrow, 702. 

 history, 685. 

 in humid regions, 689. 

 legal, economic and social effects, 



691. 

 land, drainage of, 659. 

 land, extent of, 685. 

 methods of water supply, 688. 

 methods of applying water, 695. 

 movement of water, 704. 

 preparation of land, 695. 

 relation to rainfall, 682. 

 setting of fruit, 709. 

 sewage, 711. 

 sources of water, 693. 

 sub, 696. 



theory and practice, 682. . 



units of water measurement, 706. 



Jointer, 672. 



Joints, protection in tile drains, 642. 



Kainit, potassium salt, 522. 

 Kainit to reinforce manure, 609. 

 Kames, 50. 



Kaolin, specific heat, 299. 

 Kaolinite, 9. 



Lacustrine soils, 56. 



Lagoons, 40. 



Land drainage, indications of need, 627. 



Land plaster, 542. 



Land plaster to reinforce manure, 609. 



Leaching of manure, 599. 



Leather meal as fertilizer, 507. 



Legumes and symbiosis, 458. 



Legumes, feeding power, 415. 



Legume manure, nitrogen added by, 



621. 

 Leguminous green manures, 623. 

 Lento-capillarity, 257. 

 Lento-capillarity, defined, 224. 

 Leucite, solubility, 339. 

 Level tillage, 286. 

 Lime as amendment, effects, 534. 

 Lime carbonate, 333. 

 Lime, a catalytic fertilizer, 528. 



effect on bacteria, 432, 436. 



effect on nitrates, 536. 



effect on toxic substances, 536. 



effect on efficiency of fertilizer, 569. 



effect on sanitation of soil, 138. 



effect on granulation, 193. 



fertilizer mixtures of, 566. 



Lime, flocculating agent, 160. 



forms of, 539. 



formation of humus, 152. 



green manure and, 625. 



loss in drainage, 372. 



manure and, 612. 



nitrogen fixations, 464. 



relation to available phosphorus, 

 517. 



relation to soil colloids, 166. 



relation to soil diseases, 426. 



run-off relationships, 269. 



soil separate content, 101. 



soil and subsoil content, 378. 

 Lime-magnesia ratio, 538. 

 Lime phosphate, effect of bacteria on, 



439. 

 Limestone, 6, 8. 

 Limestone for soil, 539. 

 Limestone, residual soil from, 33. 

 Limestone soil, not rich in lime, 28. 

 Limestone, weathering of, 27. 

 Limewater test for acidity, 390. 

 Limonite, 9. 



Linseed meal as fertilizer, 507. 

 Liquid manure compared with solid, 585. 

 Lister, seeder cultivator, 678. 

 Listing, effect on soil ventilation, 487. 

 Lysimeter described, 239. 

 Litmus test for acidity, 386. 

 Litter, absorptive capacity, 603. 

 Litter in manure, 578, 580. 

 Loam, defined, 104. 

 Loess, ^Eolian soil, 58. 



description and composition, 59. 



wind origin, 15. 



soil distribution of, 51. 

 Loss of manure in handling, 583, 600. 

 Low-grade fertilizer, 562. 



Machinery, tillage, 664. 

 Macroorganisms in soil, 421. 

 Macrosporium, disease organism in soil, 



426. 

 Magnesium, 4, 6 

 Magnesium carbonate, and nitrates, 536. 



catalytic fertilizer, 530. 



in soil separates, 102. 

 Manure, 489. 



Manure, amount produced by animals, 

 587. 



commercial value, 589. 



composition, causes of variation, 580. 



composition of gases from, 594. 



composition of rotted, 596. 



composting, 613. 



