334 



BOARD OF AGRICULTURE. 



depends largely on a good fine mechanical condition, — a 

 point which is not always duly considered by dealers and 

 farmers. Animal fertilizers, like bones, act slower than 

 superphosphates, and require an early application to show 

 their influence in the first year. They produce better results, 

 on account of more favorable conditions for their decompo- 

 sition during the first year, upon a light soil than upon a 

 heavy one : on the other hand, they hold out better the 

 second, and even the third year, — a fact which ought to 

 enter into the calculation of expenses for the production of 

 the crops raised hy their assistance. With these peculiarities 

 well understood, they may, on account of their high nitrogen 

 percentage, be counted among our most valuable home- 

 resources of fertilizers. 



PERUviAisr Guano. 



Warranted No. I. Peruvian Guano. 

 (Messrs. Bagg & Batchelder, Springfield, Mass.) 



Moisture lost at 100° C. . 

 Niti-ogen .... 

 Phosphoric acid 

 Potassium oxide . ' . 

 Insoluble matter, sand, &c. 



Per cent. 



11.62 

 7.96 



13.78 

 3.00 

 6.07 



This article is worth, at customary rates, $60.16. 



n. 



Rectified Peruvian Guano. 



(Manufactured by Messrs. Hobson, Hurtado, & Co., N"ew-Tork City; and 

 collected of Messrs. W. H. Bowker & Co., Boston, Mass.) 



Per cent. 



Moisture lost at 100° C 11.56 



Nitrogen 8.15 



Phosphoric acid, total 



Phosphoric acid soluble in water 



Reverted phosphoric acid . 



Insoluble phosphoric acid 



Potassium oxide 



Insoluble matter, sand, &c. 



14.12 

 12.47 



.74 



.91 



1.62 



4.33 



