44 



CONTROL SERIES No. 54 



Pulverized Animal Manures. 



Brands Showing a Commercial Shortage of $1 or More per Ton. 



(a) Two analyses. 



(6) There was 1.14% of ammoniacal nitrogen present. This would be equivalent to 5.38% 

 ammonium sulfate, or 107,6 lbs. in one ton of the pulverized manure. 



(c) This being a comparatively new product, Mr. Buell was in doubt as to what guarantee of 

 plant food would be best. The guarantee finally adopted was based on a previous analysis of what 

 he supposed was a representative sample. It apparently was too high to cover accidental varia- 

 tions. He is planning to lower the guarantee before another season. 



(di The manufacturer states that this was the first lot shipped; that the guarantee on potash 

 has already been reduced to .8% and that later analyses of new stock seem to justify the 2.5% 

 nitrogen guarantee. A test for ammoniacal nitrogen gave only .04%. 



