Field Experiments on Potatoes. u03 
Nevertlieless the subjoined experimental results obtained in 1867 
are not altogether void of interest, and therefore deserve to be 
placed on record. 
Potato Experiments with Dung and various Artificial Manures 
made in 1867 by Mr. Hetherington, at Carleton, Carlisle. 
The following manuring scheme was adopted in these experi- 
ments : — 
Table I. 
Plots. 
Name of Manure. 
Quantities used 
per I'lot of 
55 of au Acre. 
Manure 
per Acre. 
1 
2 
22 lbs. 
4 cwts. 
3 
1 ton. 
20 tons. 
22 lbs. 
4 cwts. 
4 
aud 
22 
4 
5 
6 
22", 
4 
22 ,, 
4 , , 
7 
< and 
22 ,, 
4 
8 
22 
4 
9 
1 ton. 
20 tons. 
10 
The land upon which the experiments were tried was a very 
sandy light soil, in a poor agricultural condition, and of a 
uniform cliaracter throughout. 
The potatoes were planted on the 23rd of April, and the 
manures were mixed with twice their weight of finely-powdered 
soil, and sown by hand during showery weather. 
The potatoes on the plots manured with dung made a rapid 
start and grew luxuriantly, whilst the unmanured plots, and all 
those dressed with artificial manures, came up sluggishly, and 
throughout the abnormally dry season of 1867 looked stinted, 
and evidently not doing well. The potatoes on plot 7, manured 
at the rate of 4 cwts. of common salt, more especially had an 
unhealthy, shrivelled appearance, which I have noticed several 
times before as the result of a dressing of salt on potatoes in a 
dry season. The roots were taken up in October in dry weather 
and carefully weighed. The produce of each plot is shown in 
the following table : — 
