THE COTTAGE GARDENER AND COUNTRY GENTLEMAN, October 16, 1860, 
33 
It does not appear that any reliable result can be obtained 
from a classification of “total produce” according to the kinds 
of manure used, as the quantity of manure would probably have 
even a greater influence upon the amount of crop than the kind 
of manure. 
The above results have reference only to the total produce of 
all kinds per acre ; but the following tables give the proportionate 
produce in each case of good serviceable tubers. 
Yield per cent, of good tubers, average— 
In 1858 . 85? 
1859 . 83 
1860 . 67J 
As there was such a marked decrease in the proportion of good 
tubers this year (1860), it will be necessary to calculate the mean 
yields from the results in 1858 and 1859 only, and to separate 
the results obtained in 1860. 
The various kinds of Potatoes gave the following per centages 
of good tubers :— 
Table5 - Sent. 
Lincoln 
Red. 
Pink 
Kemp. Eve. 
Radical. 
Arrowsmith’s 
Fluke. Seedling. 
1858 ... 80 .. 
. 87 . 
.. „ ... 98 
... 82 .. 
. 861 . 
• • If 
1859... 88J .. 
. 751 . 
.. 87 .. 
. 86 
... 82 .. 
. 87 . 
... 85 
— 
— 
- - 
— 
— 
—- 
Mean. 84£ 
81 
87 
92 
82 
86 ? 
85 
I860 ... 41 ... „ ... 401 ... „ ... 32 ... 68£ ... 76£ 
The small yield of the York Regent in 1858 may be traced to 
the fact that there was an extraordinarily large total crop, and 
that consequently many of the tubers which had formed had not 
come to maturity. The large yield of the Pink Eye in the same 
year will be seen on reference to table 1 to have been obtained 
from a small total crop. Both of these results were solitary ones. 
Withdrawing these two results, and comparing table 5 with 
table 1 , we obtain the following amounts as the actual yield of 
good tubers per acre of the various kinds of Potato tried— 
York Regent . 11. tons per acre 
Lincoln Red . 8.9 „ ,, 
Kemp . 8.7 „ „ 
Pink Eye . 8.6 ,, ,, 
Radical . 8.2 „ ,, 
Fluke . 8.5 ,, ,, 
[ As there were many pieces planted with York Regents in 1859, 
the excellent crops shown above to have been obtained from this 
kind of Potato can hardly be regarded a 3 unusual or special 
results. It would appear to be decidedly superior to the other 
kinds examined. 
Birt in the 1860 results there is a noticeable difference in the 
resistance to disease of the several kinds. The two flat Potatoes 
(Fiuke and Arrowsmith’s Seedling), give decidedly better results 
than the round kinds. 
The per centages of good tubers classified according to the 
spaces occupied by the plants give the next table. 
T , H . R Small. Medium. Large, 
i.oeo. under 200 inches. 200 to 240 inches.. Over 240 inches. 
1858 . 82 871 85£ 
1859 . 76 851 84 i 
Mean. 79 S6£ 85 
1860 . „ 641 60 4 
These results seem to show that there is no gain arising from 
increasing the spaces occupied by the several plants to more than 
240 inches. There is no increased proportion of good tubers ; 
and on reference to table 2 it will be seen that there is a less 
total yield from the large than from the medium spaces. 
From a comparison of tables 6 , 2 , and 3, we obtain this con¬ 
clusion—that taking in each case the per centage yield of good 
i tubers, and deducting from this the weight of the Potatoes used 
for planting, the clear profitable produce has been as follows :— 
From “ Small space ” pieces ... 8.5 tons per acre 
“ Medium space ” pieces 8.3 ,, ,, 
“Large space ” pieces ... 7.8 ,, ,, 
Taking into account the much greater amount of labour required 
in planting, cleaning, and gathering the crop from the closely 
planted pieces, it would appear that the medium planting would 
be found the most profitable. 
Classifying the results according to the times of planting 
indicated as before, the per centage yield of good Potatoes appears 
as under— 
Tabic 7. Early Planted. Medium Planted. Late Planted; 
i 1858 . 83 86J 91£ 
1859 . 814 80| . 85 
Mean. 82£ 83|- 88 
1860 ...... 59 69.| . 59 
Comparing this table with No. 4, there appears a marked 
though not a great preference to be given to the late planting 
over the early planting. As this is quite contrary to the practice 
of the best growers near London, it is possibly attributable to the 
prevalence here of cold strong winds from the north-west during 
the early spring, and is to be regarded as a purely local result. 
The following is the table of results for the present year. 
Those of 1858 and 1859 are similar in form :— 
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