288 Report of Experiments on the Growth of Barley, 
added that, although the figures and their relations would differ, 
more or less, if the increase instead of the produce were taken 
for comparison, yet the general results would be the same. 
Table XXX. — Average Annual Produce of Wheat and of Barley by purely 
Mineral Manure. 
Average Annual PnoDnCE, &c. 
Manures per Acre, per Annum : — 
3i Cwts. Superpliosphate of Lime. 
200 lbs. (1) .Sulphate Potass. 
100 lbs. (2) Sulphate Soda. 
100 lbs. Sulphate Magnesia. 
First 
10 Years, 
1852-'61. 
Second 
10 Years, 
1862-71. 
Total 
Period, 
20 Years, 
1852'-71. 
Second 
10 Years 
over 
(or under — ) 
First 10. 
Total Corn, per Acre — lbs. 
Wheat (Plot 5) 20 years, 1852-1871 
Barley (Plot 4 0) 20 years, 1852-1871 
Barley over (or under — ) Wheat 
1149 
1712 
S87 
1387 
1068 
1550 
Per Cent. 
-14-1 
-19-0 
563 
400 
482 
Straw (and Chaff), per Acre — lbs. 
Wheat (Plot 5) 20 years, 1852-1871 
Barley (Plot 4 0) 20 years, 1852-1871 
Barley over (or under — ) Wheat 
1919 
1805 
1437 
1420 
1678 
1612 
-21-3 
-114 
-17 
-65 
Total Produce (Corn, Straw, and Chaff), per Acre — lbs. 
Wheat (Plot 5) 20 years, 1852-1871 
Barley (Plot 4 0) 20 years, 1852-1871 
Barley over (or under — ) Wheat 
3068 
3517 
2424 
2807 
2746 
3162 
-21-0 
-20-2 
449 
383 
417 
(') 300 lbs. for the first 6 years of barley, and first 7 years of wheat. 
If) 200 lbs. for the first C years of barley, and fii-st 7 years of wheat. 
The result itself is remarkable from several points of view. 
The wheat plot, although it had previously yielded 8 experimen- 
tal crops, had, during that time, received considerable quantities 
of mineral manure and ammonia-salts, and some rape-cake also. 
It would be supposed, therefore, that there was more ''^condition" 
to work out of it than out of the barley plot. Then again, the 
assumed greater root-range of the autumn-sown wheat, than of 
the spring-sown barley, and the longer period of growth of the 
autumn-sown crop, would, it might be concluded, give it a greater 
command over the stores within the soil. Further, calculation 
shows that the barley crop would actually contain more nitrogen 
than the wheat. 
