350 



BOARD OF AGRICULTURE. 



Total phosphoric acid 

 SoUible phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Nitrogen 

 Potassium oxide 

 I^.lagnesium oxide . 

 Insoluble matter 



Valuation per ton of two tlionsancl pounds 



38.4 pounds of soluble phosphoric acid 

 94.8 pounds of insoluble phosphoric acid 

 118 8 pounds of reverted phosphoric acid 

 41 2 pounds of nitrogen 

 73 8 pounds of potassium oxide . 



Food for Plants. 

 (Collected from Thoma.s Aubiii, Boston, Mass.) 



Moisture at 100° C. 

 Organic and volatile matter . . 

 Ash constituents . 

 Total phosphoric acid 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Nitrogen .... 



Potassium oxide 

 Insoluble matter 



Valuation per ton of two thousand pounds 



212 pounds of soluble phosphoric acid . 

 40 pounds of insoluble phosphoric acid 

 77.8 pounds of nitrogen 

 77 2 pounds of potassium oxide . 



Stockhridf/e's Manures; Corn. 



Per cent. 



12 60 

 1.92 

 5,94 

 4.74 

 206 

 3.69 

 1.00 

 4.54 



134 77 



Per cent. 



3 38 

 42.50 

 57.50 

 12.60 

 10.60 



2.00 

 3.89 

 3.86 

 1.38 



■SSI 63 



(Bowkcr & Co. ; collected by Puffer 



Moisture 



Organic and volatile matter 



Ash constituents 



Total phosphoric acid 



Soluble phosphoric acid . 



Reverted phosphoric acid 



& Wilder, Springfield, Mass.) 



Per cent. 



12.89 

 59 60 

 40.40 

 10 30 

 6.62 

 1.91 



