236 The Canadian Horticulturist. 



plant-food and keeps the lower strata of the soil cool and moist. Wherever the 

 conditions do not forbid surface cultivation it should be practised extensively in 

 orchards, for the threefold purpose of preserving moisture, preparing plant-food 

 and shading that portion of the soil which is occupied by the roots of the grow- 

 ing plants. 



COMMERCIAL FERTILIZERS FOR THE ORCHARD 

 AND GARDEN. 



The Value of Fertilizing' Ing'redients in Raw Materials and 



Chemicals.— 



1894. 



Cents per pound. 



Nitrogen in ammonia salts, • 19 



" " nitrates, , 141^ 



Organic nitrogen in dry and fine ground fish, meat, blood, and in 



high-grade mixed fertilizers, 18^ 

 " " " cotton-seed meal, linseed meal and castor 



pomace, 1 5 



*' " " fine ground bone and tankage, 16^ 



" " " fine ground medium bone and tankage, 15 



" " " medium bone and tankage, 22 



*' " " coarse bone and tankage, 7 



•' " . " hair, horn-shavings and coarse fish scraps, 7 



Phosphoric acid soluble in water, 6 



" '• soluble in ammonia citrate, s}4 



" " in fine bone and tankage, s}4- 



" " in fine medium bone and tankage, 4)^ 



" " in medium bone and tankage, 3 



'• "in coarse bone and tankage, 2 



" " in fine ground fish, cotton-seed meal, linseed 



meal, castor pomace and wood ashes, 5 



*•' " insoluble (in am. cit.) in mixed fertilizers, 2 



Potash as High Grade Sulphate, and in mixtures from Muriate, 5 



" . " Muriate, 4>^ 



The manurial constituents contained in feedstuffs are valued as follows : 



Organic Nitrogen, 15 

 Phosphoric acid 5 



Potash, 5 



— B 51, Mass. Exper. Station. 



