576 INDEX. 



PAGI 



Landslides 12 



Laterite soils, Wohltmann's definition 416 



Terra roxa of Brazil 416 



Leaching of the land 22 



Legumes, bacteria of 150 



mostly sensitive to alkali 472 



Leguminous plants, mostly calciphile ; exceptions 518 



Leucite, potash content 32 



Lichens, action on rock -surfaces 19, 20 



Lignites and coal, how formed 127 



Lime a dominant factor in productiveness 353 



Lime carbonate in sea water 26, 27 



removed from earth's surface 41 



summary of effects in soils 379 



Lime-content, effects of high, in soils 365 



effects on availability of phosophates, table 366 



" Lime-country is a rich country " 365 



Lime, excess of, in arid soils 378 



Lime feldspars, leave lime carbonate in soils 32 



in alkali lands protects plants from salts 532 



lands, failure of tea on 414 



Lime-loving trees 490 to 429, 497 



Lime, most abundantly leached out 24 



percentages, what are adequate 367 



in coast-belt soils 496, 497 



in heavy clay soils ; table 368 



Lime renders lower amounts of plant-food adequate 354 



Limestone countries 53 



, Rotten 54 



soils, excluded from comparison of arid and humid soils. . . . 376 



residual 53 



Limestones, impure, as soil-formers 40, 53 



residual soils of, how formed 40 



soft, or marls 4o 



slow disintegration of pure 63 



Limit of acid action on soils, investigation of, by Loughridge 340 



Liuionite 44 



Loamy and sandy soils, show little shrinkage 117 



Loose surface layer, illustration of effect, figure 258, 260 



prevention of evaporation by 257 



Loss of humus in summer mulch 132 



Louisiana, vegetation and soil-characters 512 



Lowland tree-growth 506 



Lysimeter 227 



M. 



Madagascar, character and soils of 405, 406 



climate and rocks of 406 



