17 



F. Pulverized Animal Manures. 



From July 1, 1920, to July 1, 1921, 2,215 tons of pulverized sheep manure were 

 sold in Massachusetts at an average price of $54.64 per ton, the average commercial 

 valuation being $19.98 per ton. About three-foiirths of the nitrogen in these products 

 is in water insoluble form, and shows a relatively low activity by both laboratory 

 methods. The potash, although not all soluble in water, would probably be readily 

 available, as would the phosphoric acid, depending upon the rate of decomposition 

 of the manure in the soil. Although these products are dried and ground and naturally 

 more concentrated than farm manure in its natural state, yet the evaporation of 

 water and the pulverization of the product do not alter the proportions of the different 

 plant food constituents present. 



The year's inspection of this class of products shows many deficiencies and not a 

 few commercial shortages. Serious deficiencies are emphasized by boldface type. 



Brands Substaxtially Meeting their Guarantees. 



Brands Showing a Commercial Shortage. 



Joseph Breck & Sons Corp. 



Breck's Rams Head Brand Sheep Manure 



Pacific Manure and Fertilizer Co. 



"Groz-It" Pulverized Sheep Manure 



1.50 



1.49 



1.84 



1.84 



.93 



.90 



1.25 



3.67 

 3.67 



3.00 

 3.00 



1 Two analyses made. 



- Five analyses made. Commercial shortages ranging from $1.05 to $2.20 on four samples; less than $1 on one 

 sample. 



3 Ten analyses made. Commercial shortages ranging from $1.52 to $2.26 on seven samples; less than $1 on the 

 other three samples. 



In the case of the "Groz-It" Pulverized Sheep Manure, it was found necessary to 

 cancel the registration of the product and to oblige the company to lower their guar- 

 antee of nitrogen and phosphoric acid on stocks already shipped into the State, as 

 the shortages were found common to all of the stocks inspected. The company has 



