Organic matter[A] 81.33
Mineral matter,[B] (ash) 18.67
------
100.00
======
[A] Yielding nitrogen 1.635
Equal to ammonia 1.985
[B] Including insoluble silicious
matter, (clay and sand) 11.67

"Accordingly the clover-roots in an acre of land furnished 24-1/2 lbs.
of nitrogen. We have thus:

Lbs. of
nitrogen
In the six inches of surface soil 3,350
In large clover-roots 24-1/2
In second six inches of soil 1,875
---------
Total amount of nitrogen in one acre of
soil 12 inches deep 5,249-1/2
Equal to ammonia 6,374-1/2
=========

Or in round numbers, two tons six cwt. of nitrogen per acre; an enormous
quantity, which must have a powerful influence in encouraging the
luxuriant development of the succeeding wheat-crop, although only a
fraction of the total amount of nitrogen in the clover remains may
become sufficiently decomposed in time to be available to the young
wheat-plants.

CLOVER-SOIL FROM PART OF 11-ACRE FIELD OF BURCOTT LODGE FARM, LEIGHTON
BUZZARD, ONCE MOWN FOR HAY, AND LEFT AFTERWARDS FOR SEED.

"Produce 2-1/2 tons of clover-hay, and 3 cwt. of seed per acre.

"This soil was obtained within a distance of five yards from the part of
the field where the soil was dug up after the two cuttings of hay. After
the seed there was some difficulty in finding a square foot containing
the same number of large clover-roots, as that on the field twice mown;
however, at last, in the beginning of November, a square foot containing
exactly 18 strong roots, was found and dug up to a depth of 18 inches.
The soil dug after the seed was much drier than that dug after the two
cuttings of hay:

The upper six inches deep, one foot square, weighed 56 lbs.
The next " " " 58 "
The third " " " 60 "
=======

"After