157 



the covered barn yard. It was then weighed and exposed to the 

 weather from March 29th to Sept. 30th, or two days more than six 

 months. 



Into the pail in which the teachings were caught was put a small 

 amount of oxalic acid that any free ammonia in the leachings 

 might be fixed and not escape into the atmosphere. The leach- 

 ings, as often as the pail became full, were weighed and a sample 

 analyzed. At the end of the experiment the mainire was weighed 

 again, thoroughly mixed and a sample analyzed. 



During the course of the experiment the rainfall was very abun- 

 dant, moreover it came in very large quantities at a time. For 

 this reason the leaching for the most part was very rapid and at 

 times there was very little .solid matter found in the leachings. 



The maiuire weighed 226 pounds at the beginning of the ex- 

 periment and 222 pounds at the end. The amounts of the valu- 

 able constituents found at the end together with the amount re- 

 covered in the leachings with the percentage of loss is given in the 

 following table. The percentage of the valuable constituents in 

 the leachings to the total amount of valuable constituents, as 

 found in the leachings and in the manure at the end of the experi- 

 ment, is taken as the percentage of loss. 



Amount in Amount m 

 Manure at ! leachings. ' L,OSS« 

 end of expt. I 



Lbs. i Lbs. Per cent. 



Nitrogen, .... 

 Phosphoric Acid, 

 Potash, ..... 



i.oior 



•5839 

 .7992 



•0337 

 .0293 



•4367 



3.2 



4-7 



35-0 



If we reduce these figures to the money value per ton, the real 

 lesson of the experiment may perhaps be more readilj^ seen. In 

 the first colunni is given the money value of a ton of the fresh 

 manure after being leached for six months, in the .second the 

 money value of the leachings provided a ton had been exposed in 

 a compact pile one foot thick. 



In Manure 



at end 



of expt. 



In 

 leachings. 



Nitrogen @, .17, . . . 

 Phosphoric Acid @ .07, 

 Potash @ .04, 



Total. 



Ir.52 



.36 

 .28 



I2.16 



$ -05 

 .02 



•15 



1-22 



