382 



INDEX. 



Appendix I, analysis of clover, 878 

 Aquatic plants from Ohe and Iser, analy- 

 sis of ash of, 347 



Arable soil, absorptive power of, 77, 79. 

 136 



abounds in nitrogen, 290, 294 



chemical decomposition produced 



by, 79 



formation of, 78 



food present in, in state of physical 



combination, 81 



food present in, in state of chemi- 

 cal combination, 82, 83 

 mode of estimating nutritive mat- 

 ter in, by chemical analysis, 123 

 Ash constituents, number necessary for 



the growth of plants, 19 

 necessary for the formation of or- 

 ganic compounds, 39 

 Asparagus, analysis of the ash of, 335 

 Average crop, meaning of, 241 



of wheat, rye, and oats, 165 



diminution of, in Hessian Rhine, 



242 



Baden, Grand Duchy of, food of soldiers 



in, 260 



Baker and Jarvis islands, guano, 264 

 Barley, action of soda in the production 



of seed in, 319 



plant, mode of growth of, 155 

 Bavarian experiments with salts of am- 

 monia and guano, 285 



with sea salt, 317 



with nitrates, 319 



with superphosphates, 148 



Beans, growth of, in powdered turf, 114, 

 360 " 



Beech leaves, analysis of, 332 



Black soil, of Russia, its fertility, 214 



Biennial plants, growth of, 33 



Bineau, amount of nitric acid and ammo- 

 nia in rain water, estimated by, 274 



Bogenhausen, experiments with sea salt, 

 317 



with salts of ammonia and with 



guano, 286 



soil, amount of nitrogen in, 287 

 Bones acted on by steam, 263 

 Bone-earth, distribution of in the soil 



effected by organic matter, 86 

 and guano compared as to rapidity 



and duration of action, 264 



Saxon experiments with, 265 



with salts of ammonia, effects of 



compared with guano, 24T 

 Bottgcr, formation of nitrite of ammonia 



by, 309 

 Boussingault, amount of ammonia in air, 



275 

 and nitric acid in rain water 



and dew, 275 

 formed in combustion 



of coal gas, 309 



on the growth of plants without ni- 

 trogenous food, 56 



Centaurea, Cyanus, ash of, 226 



Cereals, meaning of average crop of, 241 



average crops of in Bavaria, 205 

 in Hessian Rhine, 242 



conditions for their growth, 144 



change produced in the arable soil by 

 the cultivation of, 218 



cause of difference in corn and straw 

 in, 193 



effect of removing leaves, &c., from, 

 before flowering, 43 



nitrogenous compounds in, not always 

 the same, 246 



influence of lime or magnesia on the 

 nitrogenous compounds in, 247 



influence of temperature on the 

 growth of, 48 



ratio between albuminous and non- 

 albuminous constituents in seeds of, 54 



increase at first in roots, 48 



produce of stalks and shoots in pro- 

 portion to the deyelopement of roots, 48 



produce of, with superphosphates, 

 148, 151 



compounds of ammonia, 281, 



286, 287, 288 

 common salt and nitrate of 



soda, 317 



Charlemagne, records of, 233 

 Chemical analysis of soils, limited value 



of, 214 

 Clover, analysis of, 376 



ash, analysis of, 377 



diseased, analysis of, 377 

 ash, analysis of, 377 



effect of gypsum on, 321 



crops bear no proportion to the sul- 

 phuric acid in the experiments of Dr. 

 Pincus, 324 



requires nearly the same constituents 

 as the potato, 201 



and turnips, effect of in opening the 

 soil, 97 



explanation of by Lawes and 



Gilbert, 162 



Compensation, law of, 232 

 Compost, 146 



Compound manures, action of, not de- 

 pendent upon one constituent alone, 



251 



Copper in ash of plants, 69 

 Corn, conditions for formation of, 194 

 Corn and straw, constituents in soils, 



195 

 relative proportions of in cereals 



affected by the weather, 188 

 in the Saxon experiments, 



193, 198 

 Crops reaped afford no indication of 



quantity of nutritive matter in the 



ground, 189 

 Cunnersdorf, manure experiments, 186 



produce of unmanured fields of, 186 



nearness of food in soil of, 192, 199 



produce with farm-yard manure, 202 



increased produce by farm-yard ma- 

 nure, 203 



