488 



INDEX 



Milk, composition, 461. 



effect of conditions on, 462. 



effect of feed on production^ 



methods, 466. 

 Milk fat, production, 471. 

 Milk production, effect of nutrition 



on, 468. 



Milk sugar, 369. 

 Milking, frequency, 464. 

 Minerals, 149. 

 Mineral matter, needed by animals, 



458. 

 Mineral theory of plant nutrition, 



9- 



Moraine, 69. 

 Mucic acid, 367. 

 Muck soils, 74. 

 Muds, 73. 



Muriate of potash, 310. 

 Muscovite, 151. 



Nitrate of soda, 293. 



use, 338. 

 Nitrates, accumulation, 218. 



electrical production 45. 



production in soil, 215. 

 Nitric acid of air, 47. 

 Nitrifying power, 214. 

 Nitrifying capacity, 214. 

 Nitrogen, accumulation in soils, 



54- 

 Nitrogen, assimilation by bacteria, 



45- 



assimilation by legumes, 211. 

 Nitrogen, availability, 300. 

 Nitrogen balance, 412. 

 Nitrogen, circulation, 45. 



combination of free, 45. 



essential to plants, 13. 



gains by soil, 275. 



in rain, 48. 



in rocks, 54. 



loss from soils, 273, 277. 



of air, 44. 



Nitrogen of food, use, 417. 



of soil atmosphere, 51. 



relation to pot experiments, 193. 



fixation, 204, 220. 



fixing power, 220. 

 Nitrobacter, 212. 

 Nitrification, 204, 210. 

 Nitrification, conditions, 214. 



study of, 213. 

 Nitrogen-free extract, 346, 360. 



composition, 375. 



digestibility of constituents, 408. 



heat value, 410. 



loss of energy of, 418. 



productive value, 426. 

 Nitrogenous fertilizers, 293. 

 Nutrients, productive value, 422. 

 Nutrients used in work, 453. 

 Nutritive ratio, 440, 474. 



effect on digestion, 406. 



Oats, fertilizer for, 344. 



Observation and experience, 7. 



Oils, 351. 



Onion fertilizer, 345. 



Organic matter (see humus), 4. 



decomposition, 229. 



decreases cohesion, 116. 



gains, 278. 



of soil, 228. 



and soil temperature, 112. 

 Organic theory of plant nutrition, 



9- 



Orthoclase, 150. 

 Oxalic acid, 376. 

 Ox, feeding standard, 456. 

 Oxen, compositon of gain, 443. 



fattening ration, 449. 

 Oxygen, 42. 



for germination, 42. 



weathering action, 58. 

 Oyster shells, 256. 

 Ozone, 49. 



