|
IV.
|
Table showing gradual deterioration of Peruvian guano, 1867–1881
|
329
|
|
V.
|
Composition of different guanos
|
329
|
|
VI.
|
Liebig's theory as to the action of oxalic acid in guano
|
330
|
|
VII.
|
Analyses of dung of fowls, pigeons, ducks, and geese
|
331
|
|
|
|
CHAPTER IX.—NITRATE OF SODA.
|
|
Amount of exports
|
332
|
|
Date of discovery of nitrate deposits
|
333
|
|
The origin of nitrate deposits
|
334
|
|
Forbes and Darwin on the theory of their origin
|
335
|
|
Source of nitric acid in nitrate of soda
|
337
|
|
Guano theory of origin of nitrate of soda
|
337
|
|
Nitric acid in nitrate of soda probably derived from sea-weed
|
339
|
|
Appearance of nitrate-fields
|
340
|
|
The method of mining the nitrate of soda
|
341
|
|
Composition of caliche
|
342
|
|
Extent of the nitrate deposits
|
342
|
|
Composition and properties of nitrate of soda
|
343
|
|
Nitrate applied as a top-dressing
|
344
|
|
Nitrate of soda encourages deep roots
|
344
|
|
Is nitrate of soda an exhausting manure?
|
345
|
|
Crops for which nitrate of soda is suited
|
346
|
|
Method of application of nitrate of soda
|
347
|
|
Importance of having a sufficiency of other fertilising constituents
|
348
|
|
Conclusions drawn
|
349
|
|
|
|
APPENDIX TO CHAPTER IX.
|
|
|
|
Total shipmentes from South America, 1830–1893
|
351
|
|
Total imports into Europe and United Kingdom, 1873–1892
|
351
|
|
|
|
CHAPTER X.—SULPHATE OF AMMONIA.
|
|
Value of ammonia as a manure
|
352
|
|
Sources of sulphate of ammonia
|
353
|
|
Ammonia from gas-works
|
353
|
|
Other sources
|
354
|
|
Composition, &c., of sulphate of ammonia
|
355
|
|
Application of sulphate of ammonia
|
356
|
|
|
|
APPENDIX TO CHAPTER X.
|
|
|
|
Production of sulphate of ammonia in United Kingdom, 1870–1892
|
358
|
|
|
|
CHAPTER XI.—BONES.
|
|
Early use of bones
|
359
|
|
Different forms in which bones are used
|
360
|
|
Composition of bones
|
362
|
|
The organic matter of bones
|
363
|
|
The inorganic matter of bones
|
363
|
|
Treatment of bones
|
364
|
|
Action of bones
|
365
|
|
Dissolved bones
|
368
|
|
Crops suited for bones
|
368
|
|
Bone-ash
|
369
|
|
Bone-char or bone-black
|
369
|
|
|
|
APPENDIX TO CHAPTER XI.
|
|
NOTE
|
|
I.
|
Analysis of bone-meal
|
371
|
|
II.
|
Analysis of dissolved bones
|
371
|
|
III.
|
Composition of bone-ash
|
372
|
|
IV.
|
Composition of bone-char
|
372
|
|
|
|
CHAPTER XII.—MINERAL PHOSPHATES.
|
|
Coprolites
|
|
