for Twenty Years in succession on the same Land. 279 
Table XXVI. — Average Annual Produce of Wheat, and of Barley, 
without Manure. 
Average Annual Prodoce, &c. 
Bauley more (o^ less—) 
THAN Wheat. 
Second 1 1 
First 
Second 
Period 
First 
Second 
Half 
Half 
Total 
over : 
Half 
Half 
Total 
of 
of 
Period. 
(or under- ) 
of 
of 
Period. 
Period. 
Period. 
First 1 
, Period. [ 
Period. 
Period. 
Total Corn, per Acre. 
Wheat:— 
years, 1844-1871 
20 years, 1844-1863 
20 years, 1852-1871 
Barley : — 
20 years, 1852-1871 
lbs. 
lbs. 
lbs. 
Per Cent. 
lbs. 
lbs. 
lbs. 
10.")3 
891 
972 
-15-4 
295 
137 
216 
1018 
1035 
1026 
1-7 
330 
- 7 
162 
944 
881 
913 
- 6-7 
404 
147 
275 
1348 
1028 
1188 
-23-7 ' 
1 i 
Straw (and Chaff), per Acre. 
Wheat: — 
28 years. 
1844- 
-1871 
1713 
1355 
1.534 
-20 
9 
-176 
-183 
-180 
20 years. 
1844- 
1863 
1693 
1693 
1693 
-1.56 
-521 
-339 
20 years. 
1852- 
1871 
1663 
1241 
1451 
-25 
4 
-126 
- 69 
- 97 
Barley : — 
20 years, 
1852- 
1871 
1537 
1172 
1354 
-23 
7 
Total Produce (Corn, Straw, and Chaff), per Acre. 
Wheat:— 
28 years. 
1844- 
■1871 
2766 
2246 
2506 
-18 
8 
119 
- 46 
36 
20 years. 
1844- 
-1863 
2711 
2728 
2719 
0 
6 
174 
-528 
-177 
20 years, 
1852- 
-1871 
2607 
2122 
2364 
-18 
6 
278 
78 
178 
Barley : — 
20 years, 
1852- 
-1871 
2885 
2200 
2542 
-23 
7 
It is possible, therefore, that there would be rather more nitro- 
f/enous condition to work out of the barley than out of the wheat 
land. Consistently with this, the barley gives much more excess 
of corn, and much less deficiency of straw, compared with the 
wheat in the earlier years. It also shows much more rapid 
decline in total produce than the wheat. The evidence leads to 
the conclusion, therefore, that the wheat will eventually maintain 
a somewhat higher total produce than the barley. This is what 
would be expected with the autumn-sown crop, with its longer 
period for root-development, and consequent possession of a 
greater range of soil for the collection of food. 
It has already been shown that what may be termed, in an 
