, CEOPS FEOM FAEM-YAED MANURE VARY. 



205 



The composition of farm-yard manure, as we know 

 from numerous analyses, is on the whole so much alike 

 in all places, that we may suppose without great risk of 

 error that in 100 cwt. of farm-yard manure every iield 

 receives the same nutritive substances and in the same 

 quantities. 



The constituents of farm-yard manure act every- 

 where in the same way upon the soil or the earthy par- 

 ticles. Now this apparently involves an irreconcilable 

 contradiction with the fact that the increase obtained by 

 it is nevertheless everywhere different, and that the 

 dung-constituents supplied will, on one field, set in 

 motion and render available to the cereal or potato 

 plants growing on it, twice or three times as many ele- 

 ments of food as on another field. 



This fact does not refer to the Saxon fields alone, 

 but applies generally. Nowhere, in no country, do the 

 crops obtained by farm-yard manuring on different 

 fields ever correspond, as the following table of the 

 average produce of divers crops in different provinces 

 of the kingdom of Bavaria will show. 



AVERAGE CROPS IN BAYARIA. 



(Seu/erfs Statistics.) 

 One day's work yields average produce in bushels.* 



* 1 Hectolitre 



Wheat 146 Ibs. 



Barley 128 " 



Rye 140 " 



Oats 88 " 



Spelt (in the husk) 79 " 



s on an average 1 Bavarian bushel. 



Zollverein weight. Zollverein weight. 

 330345 Ibs. 

 290300 " 

 318325 " 

 200300 " 



174220 



According to this scale, the weight of a Prussian bushel of wheat is 



