MANURING OF POTATOES. 4éy 

Can Artificial Manures be substituted successfully for a Part 
of the Farmyard Manure ? 
It has just been seen that artificial manures added to a 
moderate dressing of farmyard manure are capable of giving 
such an increase of crop as will repay their cost and leave 
a sufficient margin of profit, but it has still to be shown 
whether, by such additions of artificials to a small dressing of 
farmyard manure, crops can be grown as large as those 
obtained in ordinary practice from large applications of 
farmyard manure alone. This question has been dealt with 
only in the Yorkshire experiments of 1899 and in the Glas- 
gow experiments of 1898 and 1899. ‘The results were as 
follows :— | 
YORKSHIRE, 1899 —AVERAGE OF 5 FARMS. 
Total Produce of Crop 
Manures Applied per Acre. per Acre. 


Woes, (CB. (Ps: 
(a) 20tons Farmyard Manure - - - : =| 10 IO 3 
| 
les tons Farmyard Manure | | 
a at qh 
(4) - 15 cwt. Sulphate of Ammonia 1 : re 6 3 
6 cwt. Superphospnate 
2 cwt. Sulphate of Potash 


GLASGOW, 1898—AVERAGE OF 19 FARMS. 


Lops CWi Ois- 
(2) 20tons Farmyard Manure - - - - 9 15 O 
| fee tons Farmyard Manure 
@e cwt. Superphosphate | : : 9 
lr cwt. Sulphate of Bee | | : 
143 lbs. Nitrate of Soda 


GLASGOW, 1899—AVERAGE OF 9 FARMS. 


VOUS, (ClBs (CPS: 
(a) 20 tons Farmyard Marure - - - - - 7 64 Oo 
10 tons Farmyard Manure 
5) 14 cwt. Superphosphate | 
“7 \ 1 cwt. Sulphate of cues 
185 lbs. Muriate of Potash 
~ - - - Y) LOZ LO 


