492 



INDEX 



Soil, water extract, 201. 



water, effect on temperature, in. 



weight per foot, 114. 



wet soils, 148. 



wind blown, 71. 

 Specific gravity of soils, 113. 



Stachyose, 370. 



Stage of growth, effect on diges- 

 tion, 417. 

 Starch, 367, 370. 



digestibility, 408. 



forms fat, 441. 



loss of energy of, 418. 



manufacture, 372. 



maintenance value, 439. 



productive value, 423. 

 Steapsin, 394. 

 Stilbite, 152. 

 Stony rock, 64. 

 Straw, 22. 



Steers, maintenance ration, 439. 

 Sheep, composition of gain, 442. 



digestive power, 402. 



fattening ration, 449. 



maintenance ration, 439. 

 Subsoil, 101. 

 Sucrose, 368. 

 Sugar, loss in drying, 347. 



productive value, 422. 

 Sugars, 361. 



digestibility, 408. 



fermentation, 364. 



manufacture, 368. 



value for maintenance, 436. 

 Sulphate of ammonia, 294. 

 Sulphate of potash, 370. 

 Sulphur dioxide in air, 49. 

 Sulphur, essential to plants, 18. 



in soils, 258. 

 Superphosphates, 307. 

 Swamp, 139. 

 Syenite, 65. 

 Syrup, 369. 



Talc, 153. 



Tankage, 297. 



Tannic acid, 376. 



Tartaric acid, 376. 



Temperature, weathering by, 55. 



Therm, 377. 



Thermal energy, 420, 427. 



'Thomas phosphate, 306. 



Till, 69. 



Tilth, 90. 



Tobacco grown under shade, 41. 



stems, 308. 



soils, 93- 



Tomatoes, fertilizer for, 345. 

 Toxic theory, 158. 

 Transpiration, 119, 198. 

 Transported soils, 161. 

 Tripsin, 394. 



Truck crops, fertilizer for, 345. 

 Tubercles, 12. 

 Tyrosin, 359. 



Urea, 418. 

 Uric acid, 418. 

 Urine, 418. 



Vivianite, 155. 



Valuation of fertilizers, 314. 



Water, available, 136. 

 Water, control of, 146. 



composition of rain, 49. 



evaporation, 145. 



estimation in plants, 347. 



effect of water temperature on 

 food required, 438. 



flowing in soils, 131. 



irrigation, 261. 

 Water, in feeding, 431. 



in plants, 346. 



losses from soil, 142. 



nitrogen in rain, 48. 



quality, 269. 



quantity required by plants, 123. 

 Water culture, 10. 



