1.92 | 1.85
Equal to ammonia | 1.77 | 1.88 | 2.12 | 2.33 | 2.24
Total amount of nitrogen | 1.90 | 2.46 | 2.63 | 2.69 | 2.57
Equal to ammonia | 2.30 | 2.98 | 3.18 | 3.26 | 3.12
Ammonia in free state | .10 | .062| .023| .041| .023
Ammonia in form of salts | | | | |
easily decomposed by | | | | |
quicklime | .26 | .212| .249| .154| .159
Total amount of organic | | | | |
matter | 83.48 | 73.91 | 69.03 | 61.81 | 53.00
Total amount of mineral | | | | |
substances | 16.52 | 26.09 | 30.97 | 38.19 | 47.00
-------------------------+--------+--------+--------+--------+--------

"A comparison of these different analyses," says Dr. Voelcker, "points
out clearly the changes which fresh farm-yard manure undergoes on
keeping in a heap, exposed to the influence of the weather during a
period of twelve months and twelve days.

"1. It will be perceived that the proportion of organic matter steadily
diminishes from month to month, until the original percentage of organic
matter in the dry manure, amounting to 83.48 per cent, becomes reduced
to 53 per cent.

"2. On the other hand, the total percentage of mineral matter rises as
steadily as that of the organic matter falls.

"3. It will be seen that the loss in organic matter affects the
percentage of insoluble organic matters more than the percentage of
soluble organic substances.

"4. The percentage of soluble organic matters, indeed, increased
considerably during the first experimental period; it rose, namely, from
7.33 per cent to 12.79 per cent. Examined again on the 30th of April,
very nearly the same percentage of soluble organic matter, as on
February the 14th, was found. The August analysis shows but a slight
decrease in the percentage of soluble organic matters, while there is a
decrease of 2 per cent of soluble organic matters when the November
analysis is compared with the February analysis.

"5. The soluble mineral matters in this manure rise or fall in the
different experimental periods in the same order as the soluble organic
matters. Thus, in February, 9.84 per cent of soluble mineral matters
were found, whilst the manure contained only 4.55 per cent, when put up
into a heap in November, 185