for Twenty Years in succession on the same Land. 293 
bushels of corn, and 15^ cwts. of straw ; and an increase over tbe 
produce by the single amount of nitrate, of 5^ bushels of corn, 
and 6 cwts. of straw. 
Table XXXII. — Average Annu.al Produce and Tncroase by 400 lbs. Ammonia-salts 
alone, or 550 lbs. Nitrate of Soda alone. 
Average Ankuai, Increase. 
I'lots. 
MANURES PER ACRE, PER ANNUM.] 
Average 
Annual 
Produce. 
Over 
Unmanured 
(Plots 1 0 aud 6-1.) 
1 AA 
over 1 A. 
2 N 
over 1 N. 
Dressed Corn per Acre — Bushels. 
1 AA 
400 lbs Ammonia-salts ; 6 years, 1852-1857 
46 
'B 
2 N 
550 lbs. Nitrate of Soda; 5 years, 1853-1857 
48 
51 
Total Com per Acre — lbs. 
1 AA 
400 lbs. Ammonia-salts; 6 years, 1852-1857 
2603 
1005 
412 
2N 
550 lbs. Nitrate of Soda; 5 years, 1853-1857 
2666 
1070 
302 
Straw (and Chaff) per Acre- 
—Cwts. 
1 AA 
400 lbs. Ammonia-salts; 6 years, 1852-1857 
28^- 
121 
2N 
550 lbs. Nitrate of Soda; 5 years, 1853-1857 
3li 
151 
6 
Total Produce (Corn, Straw, and Chaff) per Acre — lbs. 
1 AA 
400 lbs. Ammonia-salts; 6 years, 1852-1857 
5794 
2371 
1066 
2N 
550 lbs. Nitrate of Soda; 5 years, 1853-1857 
6198 
2794 
972 
Weight per Bushel of Dressed Corn — lbs. 
1 AA 
400 lbs. Ammonia-salts; 6 years, 1852-1857 
50-7 
- 1-0 
-0-8 
2N 
550 lbs. Nitrate of Soda; 5 years, 1853-1857 
50-9 
- 0-7 
-l-O 
Corn to 100 Straw. 
1 AA. 
400 lbs. Ammonia-salts; 6 years, 1852-1857 
82'5 
- 5-7 
-4-4 
2 N 
550 lbs. Nitrate of Soda; 5 years, 1853-1857 
75-4 
-13-4 
-7-4 
We have here, then, by the application of ammonia-salts alone, 
or of nitrate of soda alone, an average annual produce, over 5 or 
X 2 
