22 
ACTION OF LIME AS A MANURE. 
Paddy field. Top soil. 
Dry land. 
Subsoil. 
Lime 
Phosphoric acid dissolved. 
Phosphoric acid dissolved. 
applied. 
grms. 
grms. 
per cent of 
the quantity 
applied. 
grms. 
per cent of 
the quantity 
applied. 
After . i month. 
O 
0.0063 
12.7 
0.0037 
7-4 
0.025 
0.0075 
i 5 .r 
0.0026 
5-3 
O.O5O 
0.008g 
17.8 
— 
— 
O.IOO 
0.0113 
22.6 
0.0039 
7.8 
0.250 
O.OII3 
22.6 
— 
— 
0.500 
0.0112 
22.5 
0.0039 
7-9 
After 2 months. 
0 
O.OO57 
ir-5 
0 0037 
7-5 
0.025 
O.OO72 
14.4 
0.0028 
5-7 
0.050 
0.0085 
17.x 
— 
— 
0.100 
0.0116 
23-3 
0.0043 
8.6 
0.250 
0.0136 
K> 
10 
— 
— 
0.500 
0.0135 1 
27.1 
0.0042 
8-5 
These results plainly prove that in the top soil of the paddy 
field the presence of lime had an action decidedly beneficial 
to the preservation of the assimilability of the phosphoric acid 
applied in a soluble form, and that under the conditions of 
our experiment the maximum effect was already displaj'ed 
by 0.1—0.25 grms., i. e. 1 — 2.5 % of lime in the air-dry soil. 
While in the trials without lime only 12.7 % of the whole 
soluble phosphoric acid added remained in a state soluble in 
citrate solution, the addition of 1 % of the said fertilizer to 
the soil previous to the admixture of the phosphate nearly 
doubled this quantity, after the soil had been allowed to stand 
for one month. It even appears that upon a longer action 
of the lime, after 2 months, some of the phosphate previously 
precipitated in a more insoluble form was rendered soluble in 
citrate solution by the presence of 0.25 grms. of lime per bottle, 
i. e. 2.5 %. How this slight after-effect was accomplished, 
