INDEX 



487 



Hydrogen peroxide, 48. 

 Hygroscopic water, 127. 



Igneous rocks, 63. 



Iodine in plants, 63. 



Inulin, 372. 



Ions, 198. 



Irrigation, 261. 



Irrigation water, quality, 269. 



Iron, essential to plants, 13. 



in soils, 178. 



minerals, 154. 



plant stimulant, 29. 



Kainit, 310. 

 Kaolin, 153. 

 Kaolinite, 153. 

 Kinetic energy, 420, 427. 



Lactation, 462. 

 Lactic acid, 376, 393. 



productive value 422. 

 Lactose, 369. 

 Lake deposits, 74. 

 Lambs, feeding, 459. 

 Law of minimum, 30, 32. 

 Lead in plants, n. 

 Leather, 297. 

 Leaves, ash of, 21. 

 Lecithin, 354,, 431. 

 Legumes assimilate nitrogen, 221. 



inoculation, 227. 

 Leucin, 359. 

 Light, effect on plants, 5, 39, 40. 



control of, 42. 

 Lignin, 374. 

 Lime, 1 1 6. 



application, 255. 



and acidity, 250. 



burning, 37. 



carbonate, 154. 



effect on crops, 252. 



effect on digestion 406. 



effect on nitrogen assimilation, 224. 



experiments with, 237. 



Lime, effects, 254. 



in feeds, 428. 



liberates potash, 256. 



loss by weathering, 61, 273. 



need of animals for, 452. 



per cent, in soils, 175. 



ratio to magnesia, 28. 

 Limestone, 73, 256. 



solubility 58. 



Limestone valley soils, 76. 

 Linseed meal, 297. 

 Lipase, 393. 

 Litter, 283. 

 Loams, 86. 



crops for, 92. 

 Loess, 70, 71. 

 Loess soils, 76. 



Magnesium, essential to plants, 13. 



Maintenance ration, 435. 



Malic acid, 376. 



Malt, 372. 



Maltose, 370. 



Maganese, plant stimulant, 29. 



Mannose, 367. 



Manure, 218, 280. 



application, 289. 



fermentation, 286. 



green, 290. 



horse, 282. 



losses of, 284. 



poultry, 282. 



saving, 287. 



sheep, 282. 

 Marsh gas, 394. 

 Marsh gas in air, 49. 



estimation, 414, 



from animals, 417. 

 Men, digestion experiment on, 399. 

 Metabolic nitrogen, 36. 

 Metabolic products, 395: 

 Metamorphic rock, 63. 

 Mica, 151. 



