758 



INDEX 



Manure, covered yards and pits, 605. 



denitrification of, 457. 



destruction of organic matter in 

 feed, 597. 



effect of food of animal, 582. 



effect of handling on composition, 

 583, 600. 



effects on the soil, 613. 



effect on soil ventilation, 488. 



farm, 597. 



farm corrects alkali, 403. 



fermentation, 591. 



frequent small applications, 607. 



fresh versus leached, 601. 



fire-fanging, 596. 



functions, 489. 



green, 619. 



green and lime, 625. 



Heidens formula for production, 588. 



lime and, 612. 



muck and, 613. 



needs and plant food deficiency, 334. 



organic and nitrification, 450. 



plowing under, 608. 



reinforcement, 609. 



residual effects, 614. 



rotation relation, 615. 



small versus large applications, 608. 



spreader, 608. 



storage in open piles, 606. 



yard composition, 578. 

 Marble, 6, 43. 



Marine soil compositions, 66. 

 Marl, 539. 

 Marl, composition, 38. 



found under muck, 37. 

 Marsh mud composition, 37. 

 Maturity, effect of nitrogen, 548. 

 Maturity, effect of phosphorus, 550. 

 Maximum water content, 262. 

 Measurement of water in irrigation, 706. 

 Meat, as fertilizer, 507. 

 Mechanical analysis, 84. 

 Mechanical analysis 'of samples, 728. 

 Meeker harrow, 677. 

 Metamorphic soil-forming rocks, 6. 

 Methane in soil air, 140. 

 Mica in soil separates, 101. 

 Microcline, solubility, 338. 

 Microorganisms, 424. 

 Microorganisms, effect of sulfur, 525. 

 Mineral acid, method of analysis, 338. 



colloids, 162. 



definition of, 7. 



matter, decomposition by bacteria, 

 437. 



Mineral acid, nutrients of feed in ma- 

 nure, 597. 



phosphates as fertilizer, 512. 

 Minerals, absorbed by plants, 416. 



law of decay, 24. 



relative abundance, 11. 



rock-forming, 8. 



soil-forming, 8. 

 Mineralogical character of soil separates, 



99. 



Miner's inch of water, defined, 706. 

 Minimum, law of, 551. 

 Mississippi River, denudation by, 15. 

 Mixed fertilizers, 561. 

 Modification of structure, 187. 

 Module, for measuring water, 709. 

 Moisture of the soil, 198. 



conductivity relations, 310. 



capacity of soil, effect of drainage, 

 631. 



capillary form, 210. 



conservation in irrigation, 710. 



content, effect on soil air, 476. 



control of, 264. 



effect on bacteria, 434. 



effect on cohesion, 179. 



effect of movement on soil air, 484. 



equivalents of soil, 220. 



forms of, 200. 



gravitational, 233. 



hygroscopic, 202. 



maximum content, 221. 



methods of stating, 198. 



relation to colloids, 165. 



relation to decay, 129. 



relation to plowing, 196. 



used by plant, 261. 



uses to plant, 243. 

 Moldboard plows, 667. 

 Moldboard, shapes for best result, 



196. 



Molds in soil, ammonify proteins, 427. 

 Mole drainage, 638. 

 Moraine, terminal, 50. 

 Movement, of soil air, 483. 



heat, 307. 



heat factors affecting, 308, 310. 



moisture, capillary, 221. 



moisture, factors affecting capillarity, 

 223. 



moisture, gravitational, 233. 



moisture, thermal, 241. 



water, affected by friction, 223. 



water, affected by texture, 229. 



water, affected by structure, 232. 

 Muck, defined, 36. 



