of fresh and rotten farmyard manure
286
|
|
XIII.
|
Comparison of fresh and rotten manure
|
288
|
|
XIV.
|
Lord Kinnaird's experiments
|
289
|
|
XV.
|
Drainings of manure-heaps
|
290
|
|
XVI.
|
Amounts of potash and phosphoric acid removed by rotation from a Prussian morgen (.631 acre)
|
290
|
|
XVII.
|
Composition of farmyard manure (fresh)
|
291
|
|
XVIII.
|
The urine (quantity voided)
|
291
|
|
|
|
CHAPTER VIII.—GUANO.
|
|
Importance in agriculture
|
293
|
|
Influence on British farming
|
294
|
|
Influence of guano not wholly good
|
295
|
|
Value of guano as a manure
|
296
|
|
Origin and occurrence of guano
|
297
|
|
Variation in composition of different guanos
|
299
|
|
I.
|
Nitrogenous guano—
|
|
|
(a)
|
Peruvian guano
|
300
|
|
|
Different deposits of Peruvian guano
|
301
|
|
|
Appearance, colour, and nature of Peruvian guano
|
303
|
|
|
Composition of Peruvian guano
|
304
|
|
|
(b)
|
Other nitrogenous manures: Angamos, Ichaboe
|
306
|
|
II.
|
Phosphatic guanos—
|
|
|
Occurrence of phosphatic guanos
|
308
|
|
|
Inequality in composition of phosphatic guanos
|
309
|
|
|
"Dissolved" phosphatic guano
|
310
|
|
|
"Equalised" or "rectified" guano
|
311
|
|
|
The action of phosphatic guanos as manures
|
312
|
|
|
Proportion of fertilising constituents in guano
|
314
|
|
|
Mode of application of guanos
|
315
|
|
|
Quantity of guano to be used
|
317
|
|
|
Adulteration of guano
|
318
|
|
So-called guanos—
|
|
|
Fish-guano
|
320
|
|
|
Value of fish-guano
|
322
|
|
|
Mean-meal guano
|
324
|
|
|
Value of meat-meal guano
|
324
|
|
|
Bat guano
|
325
|
|
|
Pigeon and fowl dung
|
325
|
|
|
|
APPENDIX TO CHAPTER VIII.
|
|
NOTE
|
|
I.
|
Peruvian guano imported into United Kingdom, 1865–1893
|
327
|
|
II.
|
Guano deposits of the world
|
327
|
|
III.
|
Composition of concretionary nodules
|
328
|
|
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
|
|
