out manure, would usually be in
better condition than the average potato land of this section, and
consequently a given amount of manure, applied to potatoes here, would
be likely to do more good, up to a certain point, than the same amount
would in England.
Let us look at some of the experiments that have been made in England:--
In the Transactions of the Highland and Agricultural Society of Scotland
for 1873 is a prize essay on "Experiments upon Potatoes, with Potash
Salts, on Light Land," by Charles D. Hunter, F.C.S., made on the farm of
William Lawson, in Cumberland. Mr. Hunter "was charged with the manuring
of the farm and the purchasing of chemical manures to the annual value
of [L]2,000," or say $10,000.
"Potatoes," says Mr. Hunter, "were largely grown on the farm, and in the
absence of a sufficiency of farm-yard manure, potash naturally suggested
itself as a necessary constituent of a chemical potato-manure. The soil
was light and gravelly, with an open subsoil, and the rainfall from 29
to 38 inches a year."
The first series of experiments was made in 1867. The following are some
of the results:--
Bushels per acre.
No manure 221
4 cwt. mineral superphosphate 225
4 cwt. mineral superphosphate and } 240
4 cwt. of muriate of potash }
15-1/2 tons farm-yard manure 293
"That does not say much for potash and superphosphate," said the Deacon.
"The superphosphate only produced four bushels more than the no manure,
and the potash and superphosphate only fifteen bushels more than the
superphosphate alone."
It may be worth while mentioning that one of the experimental plots this
year was on a head-land, "where the cattle frequently stand for
shelter." This plot was dressed with only eight and a half tons of
manure, and the crop was over 427 bushels per acre, while a plot
alongside, without manure, produced only 163 bushels per acre.
"That shows the importance," said the Deacon, "of planting potatoes on
rich land, rather than to plant on poor land and try to make it rich by
applying manure directly to the crop."
The following are some of the results in 1868:
Bushels per acre.
1. No manure 232
{4 cwt. superphosphate }
2. {2 " muriate of potash } 340
{2 " sulphate of ammonia }
3. 20 tons farm-yard manure 342
4. {4
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