| |
| | |
| | |
| | |
| | |
PLOT.| STANDARD MANURES. | |
-----+--------------------------------------------+---------------------+
| | Roots. | Leaves. |
| |----------+----------+
| |Tons. cwt.|Tons. cwt.|
1 |Farmyard manure, 14 tons | 6 4 | 0 17 |
2 |Farmyard manure, 14 tons, and superphosphate| 6 7 | 0 16 |
3 |Without manure, 1846, and since | 0 11 | 0 3 |
4 |Superphosphate, each year; sulphate potash, | | |
| soda, and magnesia, 1856-60 | 2 16 | 0 8 |
5 |Superphosphate, each year | 2 12 | 0 9 |
6 |Superphosphate, each year; sulphate potash, | | |
| 1856-60 | 2 7 | 0 7 |
7 |Superphosphate, each year; sulphate, potash,| | |
| and 36-1/2 lb. ammonium salts, 1856-60 | 2 12 | 0 7 |
8 |Unmanured 1853, and since; previously part | | |
| unmanured; part superphosphate | 1 3 | 0 4 |
-----+--------------------------------------------+----------+----------+

_Note._--Sulphate of ammonia is estimated to contain 23 per cent
ammonia, and muriate of ammonia 27 per cent. Ammonium salts, in each
case, equal parts sulphate and muriate of ammonia of commerce; and the
mixture is estimated to contain 25 per cent ammonia. The 328 lb. nitric
acid (sp. gr. 1.35) mixed with sawdust, and used as a cross-dressing on
the plots of Series 2 from 1856-60, were estimated to contain nitrogen =
50 lb. ammonia.

1. The crops of 1859 and 1860 failed, and were ploughed in; but as the
manures were applied, and there would be accumulation with the soil for
the succeeding crops, the average produce is calculated as for fifteen
years--that is, the produce of the thirteen years is, in each case,
divided by 15.

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