MANURING OF POTATOES. A43 

by manures on the quality and the feeding value, as well as 
on the quantity of the potatoes grown. But the limitations of 
space make it impossible to devote attention here to any 
but the leading objects of the experiments. 
The efficacy of kavmyard Manure when applied to the 
Potato Crop. 
The results of the various experiments supply fresh and 
valuable data on the amount of effect produced by farmyard 
manure on the potato crop. These data are as follows :— 




: | hese Total Increase 
Series of | eee ee Number of of Crop «Increase of f 
Ed Gas I Year im sed ee aie a - . ; : 
Experiments ys) the HXpPeriments| variety of Quantity of} produced by |} Crop obtained f 
in which py ae OM which Dees * | Farmyard | the Farmyard for each ton f 
i the result | ~ pee : | the Result Gio nd Manure Manure of Farmyard 
was ne | was : applied. over the Manure 
: »| conducted. | S : ° 
obtained. calculated. | Unmanured applied 
Plots. 
Tons. Tns. Cwt. Qrs.| Tns. Cwt. Qrs. 
' Durham - £898 I Up-to-Date r2 5 2 O.- || -© 8 2 
GOs. = 1899 6 Several 12 2 18 Oo o 4 3 
Varieties 






| Cheshire - 1899 i Britisa T5 9 18 I i) 13 I 
: Queen 
Yorkshire- 1898 I Bruce 9 6 4 oO fo) 13 3 
doer do. 4 — IO 4 IO ° o 9 Oo 
do. - 1899 5 Several 20 4 3 ° fo) 4 Co) 
Varieties 
done do. do. do. Io 2 II I o 5 I 
Glasgow - 1897 6 Maincrop 15 2 6 I ° 3 ° 
do. - do. 5 Several I5 2 16 Zi © 3 3 
Varieties 
Go, = 1898 19 Maincrop 20 4 IQ 20 FE fo) 
dow = do. do. do. 10 3 9 2 fo) 7 fo) 
do 1899 9 do. 20 3 4 fo) fo) 3 I 
do do. do do IO 2 I 3 ) 4 I 
| do do 5 Up-to-Date 20 4 18 fe) a) 5 ° 
do. = do do do. Io 3 6 2 Oo 6 3 




These figures prove quite conclusively the value and reli- 
ability of farmyard manure as amanure for the potato crop. In 
no single instance in all the trials recorded was there a case 
found in which farmyard manure failed to produce a consider- 
able increase of crop. Naturally the amount cf increase 
varied greatly, and the conditions under which the experi- 
ments were conducted were so diverse that it is hardly 
possible to deduce from all the results a useful average. The 

