How it may be best reinforced by the use of "artificials" 271
Indirect value of farmyard manure as a supplier of
_humus_ to the soil 273
Its influence on soil-texture 273
Its influence in setting free inert fertilising matter
in the soil 274
Rate at which farmyard manure ought to be applied 275
Lasting nature of farmyard manure 276
Its economic value 276

APPENDIX TO CHAPTER VII.
NOTE
I. Difference in amount of excreta voided for food consumed 279
II. Solid excreta voided by sheep, oxen, and cows 279
III. Urine voided by sheep, oxen, and cows 280
IV. Percentage of food voided in the solid and liquid
excrements 281
V. Pig excrements 281
VI. Manurial constituents in 1000 parts of ordinary foods 282
VII. Analyses of stable-manure, made respectively with
peat-moss litter and wheat-straw 283
VIII. Analyses of bracken 283
IX. Analyses of horse-manure 283
X. The nature of the chemical reactions of ammonia "fixers" 284
XI. Analyses of cow-manure 286
XII. Composition 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