6 
JOCENAL OF THE ROYAL HORTICULTURAL SOCIETY 
the times needed for the development of the tree and fruit, apply annually 
chemical fertilisers in the following proportions : — 
100 lbs. nitrate of soda = 15^ lbs. nitrogen. 
100 lbs. South Carolina rock 
superphosphate = 15| lbs. phosphoric acid. 
^ - [6 lbs. nitrogen. 
200 lbs. ground bone = | ^^^^ phosphoric acid. 
200 lbs. muriate of potash = 100 lbs. potash. 
The amounts to be applied depend upon the character of the 
soils, the kind of fruit, and the age and vigour of the tree ; these 
given perhaps mark the minimum. In a number of best orchards the 
quantities applied are very much larger than those here indicated, and 
the larger application is beheved by the growers to be proportionately 
profitable.'" 
Frank T. Shutt, Chief Chemist of the Dominion Experimental Farms, 
wrote : — 
Assuming the leaves of a full-grown apple-tree to weigh 50 lbs., and 
reckoning forty trees per acre, the manurial value contained in the leaves 
is equal to : — 
Nitrogen 17'7-4 lbs. 
Phosphoric acid .... 3-88 lbs. 
Potash 7-84 lbs. 
The leaves are returned to the soil, but the fruit is exported; 
this, in the case of an orchard twenty-five years old, producing 160 
barrels of 140 lbs. - 10 tons per acre, is a loss to the soil of approxi- 
mately : — 
Nitrogen 8'9 lbs. 
Phosphoric acid . . . . .5-3 lbs. 
Potash 32-8 lbs." 
Professor Shutt recommends for apple orchards : — 
J H lbs. nitrogen. 
100 lbs. bone meal = . 
I '16 lbs. pho.<phoric acid. 
100 lbs. superphosphate = 15 to 20 lbs. „ „ 
75 lbs. muriate of potash = 37 lbs. potash. 
Professor E. E. Faville, the late professor of the N.S. School of Horti- 
culture, in a paper on Fertilisers for Fruit Plants, gave as the yield and 
composition of fruit per acre : — 
Tons. 
Nitrogen. 
Potash. 
Phos. acid. 
Apples 
15 
30 lbs. 
45 lbs. 
3 lbs. 
Pears 
10 
12 lbs. 
36 lbs. 
10 lbs. 
Plums 
2 
IG lbs. 
8 lbs. 
2 lbs. 
Berries 
11?^ 
Trace 
7 lbs. 
2h lbs. 
