255
|
|
Two classes of bacteria active in this work, aerobies and anaerobies
|
255
|
|
|
Conditions influencing fermentation—
|
|
|
Temperature
|
256
|
|
|
Openness to the air
|
256
|
|
|
Dampness
|
257
|
|
|
Composition of manure
|
257
|
|
|
Products of fermentation
|
257
|
|
Analyses of farmyard manure—
|
|
|
Dr. Voelcker's experiments
|
259
|
|
|
Variation in composition
|
259
|
|
|
Amounts of moisture, organic matter (containing nitrogen), and mineral matter
|
260
|
|
|
Its manurial value compared with nitrate of soda, sulphate of ammonia, and superphosphate
|
260
|
|
Comparison of fresh and rotten manure—
|
|
|
The nature and amount of loss sustained in the process of rotting
|
261
|
|
|
Ought manure to be appliled fresh or rotten?
|
262
|
|
Relative merits of covered and uncovered manure-heaps
|
263
|
|
Methods of application of farmyard manure to the field—
|
|
|
Merits and demerits of the different methods
|
265
|
|
|
Setting it out in heaps
|
265
|
|
|
Spreading it broadcast, and letting it lie
|
266
|
|
|
Ploughing it in immediately
|
267
|
|
Value and function of farmyard manure—
|
|
|
As a supplier of the necessary elements of plant-food
|
268
|
|
|
As a "universal" manure
|
269
|
|
|
Proportion in which nitrogen, phosphoric acid, and potash are required by crops
|
269
|
|
|
Proportion in which they are present in farmyard manure
|
270
|
|
|
Farmyard manure poor in nitrogen
|
270
|
|
|
Lawes' and Gilbert's experiments
|
271
|
|
|
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.
|
|
