412 



INDEX. 



LEA 



Farm-yard manuring sj^stem, changes 

 produced in the composition of the 

 soil by, 226 



final result of, 231 



illustrated in 



the Saxon experiments, 231 



Fodder plants, proportion retained in 

 bodies of animals, 227 



transfer food from subsoil to 



surface soil, 26 



Fontinalis, antipj-retica, ash analysis of, 

 370 



Food, physically and chemically com- 

 bined in soils, 71 



— not absorbed by plants from solu- 

 tions in soils, 85, 95, 102 



— diffusion of, in soils, how effected, 

 75, 77 



by chemical and mechanical 



means, 87 



— closeness of in soils, 197 



GKOirV'EN, analysis of diseased 

 clover, 407 

 Guano, amount of, equivalent to farm- 

 yard manure, 301 



— and bone-earth, effects of, compared, 

 279 



— and farm-yard manure, amoiint of 

 phosphates and nitrogen in, 264 



— from Baker and Jarvis islands, 278 



— fertilising action of, attributed to 

 its nitrogen or ammonia, 258, 296 



due in many cases to fixed 



constituents, 258 



— deficient in potash, 261 



— and farm-yard manure, effects of, 

 compared, 261 



— when its application will be success- 

 ful, 263 



— continued use of, exhausts the soil 

 of silica and potash, 264 



— mixed with sulphuric acid and turf 

 or sawdust, 265 



— peculiar effects of, illustrated in the 

 Saxon experiments with different 

 crops, 265 



— and salts of ammonia, comparative 

 experiments with, in Bavaria, 301 



Gj'psum, 335 



— experiments on clover, 340 



— action of arable soil on solutions of, 34 5 



— effects the distribution of potash 

 and magnesia in soils, 347 



HORSE-CHESTNUT, analysis of ash 

 of leaves of, 356 

 Human excrements, value of, as manure, 

 illustrated at Eastadt, 272 



Human excrements, price of, 272 



not injured by deodorising by 



sulphate of iron, 274 



IGNORANT practical men, 249 

 Iodine, different amount in different 

 plants, 58 

 Iron necessaiy for plants, 57 

 Irrigation, mineral matters supplied in, 



402 

 — water, suspended mud of, most va- 

 luable, 403 



JAPANESE husbandry, 387 

 dispenses with cattle feeding, 



389 



— soil, 386 



— supply of manure, 390 



— mode of constructing privies, 391 



— mode of preparing excrements and 

 compost for application in field, 392 



— system of mauuring, only one of 

 top-dressing, 393 



— system of planting in roM's, 394, 

 399 



— husbandry compared with European, 

 396 



— tillage of the soil, 398 



— succession of plants illustrated, 400 

 Jerusalem artichokes, effect of the cul- 

 tivation of, on arable soil, 222 



TTNOP, experiments of, on growth of 

 Ja. plants in solutions of their food, 373 

 Kolbe, formation of nitrous acid, 327 

 Kotitz, immanured field produce from, 



190 

 Ki'oker, estimation of nitrogen in soils, 



306 

 — analysis of drainage water, 364 

 Kuhlmann, experiments with salts of 



ammonia, 304, 336 



sea salt, 336 



lime, 350 



LARGE crops indicate the available 

 condition of the mineral food, 194 



depend on the closeness of the 



nutritive substances in the soil (fi- 

 gure), 195 



Lawes and Gilbert on clover sickness, 

 157 



reason of the failiire of the ex- 

 periments of, 160 



Leaves, principal conditions for the for- 

 mation of, 234 



