for Twenty Years in succession on the same Land. 285 
Table XXIX. — Average Annual Produce, and Increase' by purely Mineral Manures. 
SIancres, rr.R Annuh. 
AvEKAGE Annual Produce, &c. 
First 
10 Years, 
1852-'61. 
Total 
Second 
Period, 
10 Years, 
20 Years, 
18627'71. 
1852-'71. 
Second 
10 Years 
over 
(or under — ) 
First 10. 
Increase over (or nnder — ) 
Unjianubed (Plots 1 0 and 6-1.) 
First 
10 Years, 
1852-'61. 
Second 
10 Years, 
1862-'71. 
Total 
Period, 
20 Years, 
1852-'71. 
Dressed Corn, per Acre — Bushels. 
Superphosphate 
Mixed Alkali-salts 
(■Superphosphate andl 
\ Mixed Alkali-salts/ 
Per Cent. 
28 
23| 
25| 
-17-0 
5 
20J 
22i 
-19*1 
1 ' 
n 
U 
24| 
27i 
-20-0 
61 
6i 
6^ 
Total Corn, per Acre — lbs. 
Superphosphate 
Mixed Alkali-salts . . 
(Superphosphate and! 
I Mixed Alkali-salts J 
1562 
1.317 
1439 
-15 
7 
214 
289 
252 
1396 
1139 
1268 
-18 
4 
48 
112 
80 
1712 
1387 
1550 
-19 
0 
365 
360 
363 
Straw (and Chaff), per Acre — Cwts. 
Superphosphate 
Mixed Alkali-salts .. 
(■Superphosphate andl 
\ Mixed Alkali-salts/ 
141 
131 
16| 
Hi 
lOf 
121 
131 
12i 
14i 
-20-2 
-22-5 
-21-7 
n 
3 
13 
'5 
i 
2| 
1 
4 
2i 
Total Produce (Corn, Straw, and Chaff), per Acre- 
-lbs. 
Superphosphate 
Mixed Alkali-salts . . 
(■Superphosphate and"! 
\ Mixed Alkali-saltsj 
3223 
2944 
3517 
2639 
2338 
2807 
2931 
2641 
3162 
-18-1 
-20-6 
-20-2 
338 
59 
632 
439 
138 
607 
389 
99 
621 
Weight per Bushel of Dressed Corn — lbs. 
I20 
3 0 
j4 0 
Superphosphate 
Mixed Alkali-salts.. 
(■Superphosphate and"! 
\ Mixed Alkali-salts/ 
52-1 
51- 8 
52- 3 
54-4 
54'3 
54-6 
53-2 
53-0 
53-4 
4-4 
4-8 
4.4 
0-6 
0-3 
0-8 
1-1 
1-0 
1'3 
0-8 
0- 6 
1- 0 
" Corn to 100 Straw. 
!2 0 
3 0 
4 0 
1 
Superphosphate 
Mixed Alkali-salts 
(Superphosphate audi 
\ Mixed Alkali-salts) 
93-8 
90-0 
95-1 
100-4 
94-7 
97-7 
97-1 
92-4 
96-4 
! 7-0 
5-2 
2-7 
5-9 
2-1 
7-2 
12-0 
6'3 
9-3 
9-0 
4-3 
8-3 
