not quite 9-1/4 bushels per
acre, and with a full dressing of mixed mineral manures and
superphosphate, 10 bushels per acre.

The weight per bushel on the unmanured plot was 45 lbs.; with mixed
mineral manures, 48-1/2 lbs.; with ammonia-salts alone, 48-1/2 lbs.;
with barn-yard manure, 51 lbs.; and with ammonia-salts and mixed mineral
manures, 52-1/4 lbs.

Farmers are greatly dependent on the season, but the good farmer, who
keeps up the fertility of his land stands a better chance of making
money (or of losing less), than the farmer who depends on the unaided
products of the soil. The one gets 6 bushels per acre, and 1,413 lbs. of
straw of very inferior quality; the other gets 20 to 26 bushels per
acre, and 5,000 lbs. of straw. And you must recollect that in an
unfavorable season we are pretty certain to get high prices.

The _eleventh_ season (1853-4,) gives us much more attractive-looking
figures! We have over 21 bushels per acre on the plot which has grown
eleven crops of wheat in eleven years without any manure.

With barn-yard manure, over 41 bushels per acre. With ammonia-salts
alone (17_a_), 45-3/4 bushels. With ammonia-salts and mixed minerals,
(16_b_), over 50 bushels per acre, and 6,635 lbs. of straw. A total
produce of nearly 5-1/2 tons per acre.

The _twelfth_ season (1854-5), gives us 17 bushels of wheat per acre on
the continuously unmanured plot. Over 34-1/2 bushels on the plot manured
with barn-yard manure. And I think, for the first time since the
commencement of the experiments, this plot produces the largest yield of
any plot in the field. And well it may, for it has now had, in twelve
years, 168 tons of barn-yard manure per acre!

Several of the plots with ammonia-salts and mixed minerals, are nearly
up to it in grain, and ahead of it in straw.

The _thirteenth_ season (1855-6), gives 14-1/2 bushels on the unmanured
plot; over 36-1/4 bushels on the plot manured with barn-yard manure; and
over 40 bushels on 8_a_, dressed with 600 lbs. ammonia-salts and mixed
mineral manures. It will be noticed that 800 lbs. ammonia-salts does not
give quite as large a yield this year as 600 lbs. I suppose 40 bushels
per acre was all that the _season_ was capable of producing, and an
extra quantity of ammonia did no good. 400 lbs. of ammonia-salts, on
7_a_, produced 37-1/4 bushels per acre, and 800 lbs. on 16_b_, only
37-3/4 bushels. That extra half bushel of wheat was produced at
considerable cost.

The _fo