| lb. | lb. | lb. |
Farmyard manure, 14 tons per annum | | | |
since 1843 | 60 | 60-3/8 | 60-1/4 |
Unmanured continuously | 57-5/8 | 58-3/4 | 58-1/4 |
Mixed mineral manures and 3-1/2 | | | |
cwt. superphosphate | 58-7/8 | 59 | 58-7/8 |
Mixed mineral manures, 3-1/2 cwt. | | | |
superphosphate, 200 lb. ammonium | | | |
salts | 59-3/8 | 60 | 59-5/8 |
Mixed mineral manures and 3-1/2 cwt. | | | |
superphosphate, 600 lb. ammonium | | | |
salts | 59 | 60 | 59-1/2 |
Mixed mineral manures, 3-1/2 cwt. | | | |
superphosphate, 275 lb. nitrate of | | | |
soda | 58-3/8 | 59-5/8 | 59 |
275 lb. nitrate of soda | 56-5/8 | 56-5/8 | 56-5/8 |
400 lb. ammonium salts every year | | | |
since 1845 | 58 | 57-3/8 | 57-5/8 |
400 lb. ammonium salts, 3-1/2 cwt. | | | |
superphosphate | 57-3/8 | 58 | 57-5/8 |
Mineral manure, 3-1/2 cwt. | | | |
superphosphate, 400 lb. ammonium | | | |
salts in autumn | 59-1/2 | 60 | 59-3/4 |
-------------------------------------+------------+------------+------------+
-------------------------------------+--------------------------------------
| PRODUCE PER ACRE--AVERAGE PER ANNUM.
+--------------------------------------
MANURES PER ACRE PER ANNUM. | Total straw.
+--------------------------------------
| 20 years, | 20 years, | 40 years
| 1852-71. | 1872-91. | 1852-91.
-------------------------------------+------------+------------+---------