578 INDEX. 



PAGB 



Mississippi, southern, central prairie, long-leaf-pine belts 493 



coast-belt ; pine meadows ; profile 495 



live-oak or shell hammocks 495 



Mississippi valley, climate of 298 



Mississippi water, annual variations in 25 



generalized composition of 25 



Modiola, of Chile 469 



Moisture hygroscopic, table 196 



influence of temperature and air-saturation 197 



method of determining 197, 198 



Mitscherlich's objections 199 



utility to plant growth 199 



available to growing plants 211 



distribution in soil, as affected by vegetation 264 



evaporated from forests 265 



Eucalyptus 265 



in Russian forests and steppes 265 



requirements of crops in the arid region 212 



l,oughridge's tables of same 214 



supplied by tap roots 229 



useful to crops retained by alkali lands 433 



wasted by weeds 264 



Moraines, in North Central states 5 



Mosses, follow lichens in rock decomposition 20 



Moulds and fungi, action of 123 



Mountain chains, arid climate under lee of 294 



effects of, on rainfall 293 



Muddy waters 251 



Muir glacier, analysis of mud 5 



Mulches, loss of humus 132 



Mulching with straw, sand , 266 



Mustard family, sensitive to alkali 473 



Myrobalan root, use for grafting in alkali lands 479 



N. 



Native vegetation, basis of land values for farmers 488 



causes governing its distribution not an unsolvable 



problem 489 



result of struggle for existence 487 



Native grasses for alkali lands 470 



Native growth, cogency of conclusions based on 314 



New Mexico, soils from ; analysis 378 



Nile water, Letheby's analyses of 25 



Nitrate deposits, origin of. - 67 



of soda 66 



Nitrates, waste of, by leaching 24, 68 



Nitrification, active in matiere noire 360 



