x CONTENTS. 



How it may be best reinforced by the use of " arti- 

 ficials " 47 



Indirect value of farmyard manure as a supplier of 

 humus to the soil ....... 49 



Its influence on soil-texture ..... 49 



Its influence in setting free inert fertilising matter in 

 the soil ......... 50 



Rate at which farmyard manure ought to be applied . . 50 

 Lasting nature of farmyard manure . . . . .51 



Its economic value . . . . . . . .52 



APPENDIX 

 NOTE 



I. Difference in amount of excreta voided for food con- 

 sumed 53 



II. Solid excreta voided by sheep, oxen, and cows . . 53 



III. Urine voided by sheep, oxen, and cows ... 54 



IV. Percentage of food voided in the solid and liquid ex- 



crements ........ 55 



Y. Pig excrements ........ 55 



VI. Manurial constituents in 1000 parts of ordinary foods 56 

 VII. Analyses of stable - manure, made respectively with 



peat-moss litter and wheat-straw .... 57 



VIII. Analyses of bracken 57 



IX. Analyses of horse-manure ...... 57 



X. The nature of the chemical reactions of ammonia 



"fixers" ........ 58 



XI. Analyses of cow-manure ...... 60 



XII. Composition of fresh and rotten farmyard manure . 60 



XIII. Comparison of fresh and rotten manure ... 62 



XIV. Lord Kinnaird's experiments 63 



XV. Drainings of manure-heaps . . . . . .64 



XVI. Amounts of potash and phosphoric acid removed by 

 the following rotations from a Prussian morgen ('631 

 acre) 64 



