loo The Canadian Horticulturist. 



Frozen Trees. 



797 > Sir, — Since last spring frost, some of my apple trees are dead some four or five 

 feet down the branches, to where they are an inch or so in diameter. Do you think they 

 will recover ? 



John Ualgarno, Sullivan. 



If not injured farther, cut off the dead wood, and the trees will no doubt 

 grow up from below, and make good trees much sooner than planting new ones. 



Raspberries for Home Use. 



798. Sib, — I want to plant a patch of raspberries for home use, two or three varieties. 

 Quality not to be the chief consideration ? 



J. D., Sullivan. 



Of red raspberries, try Marlboro', Turner, and Cuthbert ; of black caps, 

 Gregg, and Hilborn ; and for canning, the Shaffer. 



Abundance and Burbank Plums. 



999. Sir, — Are these hardy enough for Northumberland County ? 



W. C. R. 



Muriate of Potash. 



SOO. Sir, — Where can I buy muriate of potash, and at what price ? 



J. S. , Henryshurg. 



Manurial Value of Tannery Refuse. 



801. Sir, — Would you kindly inform me, if convenient, what the manurial value 

 of the refuse from a tannery is for fruit trees, and how much it would be advisable to 

 apply per acre to light soil not very rich, i. e., worked out considerably ; and for peaches 

 and blackberries ? Would it pay to give 25c. per load, assuming the hauling cost nothing ? 

 What is the highest price it would pay to give for it ? 



L. Ci. Morgan, Port Dover, Ont. 



Reply by F. T. Shutt, Chemist Central Experimental Farm, Ottawa. 



I have your communication of the 13th inst., requesting information respect- 

 ing tannery refuse. Tannery refuse consists of scrapings and trimmings from 

 the hides, pieces of flesh, hair, etc., and, consequently, is an organic manure. 

 Its chief fertilizing constituent is nitrogen, and the agricultural value of any 

 particular sample will depend not only upon the percentage of this element 

 present, but also upon the condition in which the nitrogen occurs. Thus, the 

 nitrogen of flesh is much more available for plant food than that of hair ; hence, 

 the proportion of flesh to hair in the refuse must be taken into account when 

 considering the value of this material. 



