64 APPENDIX. 



NOTE XV. (p. 40). 

 DRAININGS OF MANURE-HEAPS. 



The importance of not separating the liquid portion 

 from the solid portion has already been pointed out in 

 dealing with the composition of the solid excreta and the 

 urine. These two constituents of the manure are comple- 

 mentary to one another, and the value of farmyard manure 

 as a general manure is very much impaired if the liquid 

 portion is not applied along with the solid. In one im- 

 portant respect do the drainings of manure-heaps differ from 

 urine that is, in the percentage of phosphates they contain, 

 the latter being practically devoid of phosphoric acid. 



The following is an analysis of drainings from a manure- 

 heap (Wolff) : 



Dry substance . . 18.0 Magnesia ... 0.4 

 Ash . . . 10.7 Phosphoric acid . 0.1 

 Nitrogen. . . 1.5 Sulphuric acid . . 0.7 



Potash . . . 4.9 



Lime . . . 0.3 



Silica . . . 0.2 



NOTE XVI. (p. 45). 



AMOUNTS OF POTASH AND PHOSPHORIC ACID REMOVED BY THE 

 FOLLOWING ROTATIONS FROM A PRUSSIAN MORGEN (.631 

 ACRE). 



Potash. Phosphoric acid. 

 Ib. Ib. 



1. Wheat . . . . . 16.40 10.67 



Oats . . . . . 10.47 4.59 



Potatoes . . . . 66.41 18.33 



Hay 39.54 11.32 



132.82 44.81 



The ratio of potash to phosphoric acid is 2.96 to 1. 



Wheat 16.90 10.67 



Barley 17.44 10.65 



Potatoes . . . . 66.41 18.33 



Hay 39.54 11.32 



140.29 50.97 



The ratio of potash to phosphoric acid is 2.76 to 1. 



