INDEX 



485 



Corn, depth of rooting, 104. 



fertilizer for, 344. 

 Cotton, fertilizer for, 344. 

 Cottonseed, 297, 370. 

 Cottonseed hulls, digestibility, 408. 

 Cottonseed meal, 297, 391. 

 Cover crops, 291. 

 Cows, feeding, 461. 

 Crude fiber, 346. 



digestion, 394. 



heat value, 409. . . 



loss of energy of, 418. 



productive value, 422. 

 Crystalline rock, 63. 

 Cultivation, 147. 

 Cumulose soil, 63. 

 Cutin, 374. 

 Cyanamide, 45. 



Dextrose, 370. 

 Denitrification, 204, 218. 

 Diffusion, 197. 

 Digestion, 392. 



artificial, 399- 



energy expended in, 417, 420. 



experiments, 398. 



influence of conditions on, 402. 



losses of energy in, 418. 



marsh gas produced in, 417. 



measure of losses of energy in, 

 420. 



study of, 395- 



time of, 398. 

 Diorite, 65. 

 Drainage, 141. 

 Drain gauge, 143. 

 Dry farming, 139. 

 Duty of water, 126. 

 Dynamiting soils, 107. 



Elements, essential to plants, n. 

 Energy, available, 420. 

 Energy balance, 415. 

 Energy in work, 455. 



Energy, kinetic, 420. 



loss of, 419- 



of food, disposition of, 417. 



productive, 426. 



thermal, 420. 

 Enzyme, 364, 392. 

 Essential oils, 377. 

 Essential elements, 13, 27. 

 .Ether extract, 346, 348. 



composition, 349. 



digestibility of constituents, 409. 



heat value, 410. 



of soils, 157. 



productive value, 422. 

 Experiment, methods, 6. 

 Experiment stations, I 



Fat, composition, 414. 



effect on digestion, 404. 



effect on milk production, 470. 



food required to produce, 444. 



modified by food, 441. 



productive value, 422. 



value in feeding, 475. 



value for maintenance, 435. 



value for work, 455. 

 Fat value, 427. 

 Fats, digestion, 39. 

 Fats, used in work, 453. 

 Fattening, practice of, 450. 

 Fattening rations, factors which 



modify, 443. 

 Feed laws, 386. 

 Feeds, injurious, 387. 



mineral constituents of, 428. 

 Feeds, preparation, 388. 

 Feeds, productive value, 423. 

 Feed, productive values (table), 

 480. 



value for maintenance, 435. 

 Feeding experiments, 447. 



on cows, 466. 

 Feeding for maintenance, 439. 



