or whether they could get all they needed from the
soil and the atmosphere. The enormous quantities of carbonaceous matter
supplied by the barn-yard manure, it is quite evident, are of little
value as a manure for wheat. And the rice seems to have done very little
more good than we should expect from the 22 lbs. of nitrogen which it
contained. The large quantity of carbonaceous matter evidently did
little good. Available carbonaceous matter, such as starch, sugar, and
oil, was intended as food for man and beast--not as food for wheat or
tobacco.

The following table gives the results of the experiments the _fifth_
year, 1847-8.

Experiments at Rothamsted on the Growth of Wheat, Year After Year,
on the Same Land.

Table V.--Manures and Produce; 5th Season, 1847-8. Manures and Seed
(Old Red Lammas), Sown Autumn, 1847.

Manures
FM Farm-yard Manure.
P-A Pearl-ash.
S-A Soda-ash.
SMg Sulphate of Magnesia.
SPL Superphosphate of Lime.
B-A Bone-ash.
SAc Sulphuric Acid (Sp. gr. 1.7.)
MAc Muriatic Acid.
SAm Sulphate of Ammonia.
MAm Muriate of Ammonia.
RC Rape-Cake.

---+-----------------------------------------------------------------+
| Manure per Acre, etc. |
P +-----+-----+-----+-----+-----+-----------------------+-----+-----+
l | | | | | | Superphosphate | | |
o | | | | | | of Lime. | | |
t | | | | | +-----+-----+-----+-----+ | |
s | FM | P-A | S-A | SMg | SPL | B-A | SAc | MAc | SAm | MAm | RC |
---+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| Tons|lbs. |lbs. |lbs. |lbs. |lbs. |lbs. |lbs. |lbs. |lbs. |lbs. |
0 | .. | .. | .. | .. |2240 | .. | .. | .. | .. | .. | .. |
1 | .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | .. |
2 | 14| .. | .. | .. | .. | .. | .. | .. | .. | .. | .. |
3 | Unmanured.| .. | .. | .. | .. | .. | .. | .. | .. | .. |
| | | | | | | | | | | |
4 | .. | .. | .. | .. | .. | 200 | .. | 200 | 300 | .. | .. |
| | | | | | | | | | | |
5 | .. | 300 | 200 | 100 | .. | 200 | 150 | .. | 250 | 250 | .. |
5 | .. | 300 | 200 | 100 | .. | 200 | 150 | .. | 200 | 200 | 500 |
6 | .. | .. | .. | ..