INDEX OF SUBJECT MATTER 



577 



Limestone, conversion factors, 367. 



fineness of average product, 378. 



fineness of for agricultural use, 367. 



grading of as to fineness, 377. 



importance of fineness, 377. 



mechanical composition as sold in 

 Pennsylvania, 379. 



ratio of calcium and magnesium, 375. 

 Liming, amounts of lime to apply, 368. 



calcium and magnesium ratio of, 

 375. 



cause of crop response to, 372. 



crop response to, 372. 



forms of lime to apply, 367. 



importance of in soil improvement, 

 381. 



method and time of applying lime, 

 374. 



reasons for, 362. 

 Limonite, source of in soil, 7. 



production of from hematite, 27. 



weathering of, 33. 

 Limonite group, as soil color, 37. 

 Linseed meal, composition of, 446. 

 Lithosphere, composition of compared to 



soils, 13. 

 Litmus paper test, criticism of, 360. 



procedure, 358. 



use of potassium nitrate with, 358. 

 Litter, absorptive power of, 521. 



influence on character of manure, 

 521. 

 Loam, defined, 82. 

 Loess, a wind laid soil, 21. 



character of, 62. 



chemical composition of, 63. 



importance of, 63. 



location of, 62. 



minerals of, 62. ^ 



origin of, 61. 

 Loss of nutrients from soil, 554. 



types of, 289. 

 Loss of soil heat, by conduction, 240. 



by evaporation, 240. 



by radiation, 240. 

 Loss of soil water by run off, 203. 

 Losses during the and han- 



dling of n 

 Losses from and a soils under 



various ty; ing, 558. 



Lysimeter experime: '■. Bi nberg, 272. 

 306. 



Lysimeter experiments, at Cornell Uni- 

 versity, 307. 

 at Rothamsted Experiment Farm, 

 180, 217, 288. 

 Lysimeters, nature of, 180. 



of Cornell University, 181. 

 of Rothamsted Experiment Station, 

 180. 



Macro-organisms of the soil, 384. 

 Maintenance of soil fertility, 554. 



influence of different types of farm- 

 ing on, 558. 



program of, 560. 

 Maintenance of soil organic matter, 122. 

 Maize, influence of farm manure on, 534. 



influence on nitrate accumulation, 

 428. 



influence on nitrification, 422. 

 Manganese, relation of to soil acidity, 347. 

 Mangum terrace, 205. 

 Manurial practices, phases of, 520. 

 Marine soils, character of, 51. 



chemical composition of, 52. 



importance of, 51. 



origin of, 50. 

 Marl, origin and nature of, 45. 



term defined, 45. 



use of, 45. 

 Maximum retentive power of soil for 

 water, 162. 



determination of, 162. 

 Maximum water capacity of soils, data 



on, 166. 

 Meadows, influence of manure on, 532. 

 Mechanical analysis of soils, 67. 



beaker method, 69. 



Bureau of Soils method, 71. 



determination of soil class from, 84. 



value of, 79. 

 Mechanical analyses of typical soils, 83. 



of various soils, 81. 

 Methods of applying fertilizers, 495. 

 Methods of studying drainage losses, 180. 

 Micro-organisms of the soil, 386. 

 Micron, magnitude of, 128. 

 Millimicron, magnitude of, 128. 

 Mineral constituents of soils, bulk analy- 

 sis of, 314. 



extraction of with dilute acids, 317. 



extraction of with strong acids, 316. 



extraction of with water, 319. 



