---
| cwt. | cwt. | cwt.
Farmyard manure, 14 tons per annum | | |
since 1843 | 33-7/8 | 31-3/8 | 32-5/8
Unmanured continuously | 13 | 8-5/8 | 10-5/8
Mixed mineral manures and 3-1/2 | | |
cwt. superphosphate | 15 | 9-3/4 | 12-3/8
Mixed mineral manures, 3-1/2 cwt. | | |
superphosphate, 200 lb. ammonium | | |
salts | 24-1/2 | 19-1/8 | 21-7/8
Mixed mineral manures and 3-1/2 cwt. | | |
superphosphate, 600 lb. ammonium | | |
salts | 41-3/8 | 39-5/8 | 40-1/2
Mixed mineral manures, 3-1/2 cwt. | | |
superphosphate, 275 lb. nitrate of | | |
soda | 41-1/2 | 37-3/4 | 39-5/8
275 lb. nitrate of soda | 28-1/4 | 18-1/2 | 23-3/8
400 lb. ammonium salts every year | | |
since 1845 | 24-3/4 | 16-1/4 | 20-1/2
400 lb. ammonium salts, 3-1/2 cwt. | | |
superphosphate | 26-3/8 | 21 | 23-3/4
Mineral manure, 3-1/2 cwt. | | |
superphosphate, 400 lb. ammonium | | |
salts in autumn | 31-1/4 | 28-3/8 | 29-3/4
-------------------------------------+------------+------------+------------
1. By the term mixed mineral manures is meant a mixture of mineral
fertilisers, not including phosphates.

Table VI.--EXPERIMENTS ON THE GROWTH OF BARLEY FOR FORTY YEARS, 1852-91.

-------------------------------------+--------------------------------------+
| PRODUCE PER ACRE--AVERAGE PER ANNUM. |
+--------------------------------------+
| Dressed grain. |
MANURES PER ACRE PER ANNUM. +--------------------------------------+
| Quantity. |
+------------+------------+------------+
| 20 yea