MANURING EXPERIMENTS WITH PADDY RICE. 
33 
Moisture. 
Potash in the dry 
matter. 
Manure per tan : 
Grain. 
Straw. 
Grain. 
Straw. 
Whole 
7 . 
7 « 
7 « 
7 « 
Crop. 
7 o 
Unmanured. 
14.92 
15.80 
0.289 
o.ggS 
0.705 
No potash, 25 kil. phosphoric acid and 15 
kil. nitrogen. 
14.56 
14.70 
0.304 
0.46g 
0.429 
No nitrogen, 25 kil. phosphoric acid and 
20 kil. potash. 
No phosphoric acid, 15 kil. nitrogen and 
14.36 
15.88 
0-33° 
1.620 
1-053 
20 kil. potash. 
i5-°3 
r 5-94 
0-315 
I.OO 4 
0.876 
Potash Series. 
25 kil. phosphoric acid, 15 kil. nitrogen, 
and the following quantities of potash : 
5 kilogrms. 
14.41 
15-37 
0.284 
0.702 
0.547 
10 „ . 
14.59 
15.28 
0.293 
1.005 
O. 7 IO 
15 » . 
*4-44 
14.84 
0.314 
1.252 
0.865 
20 „ . 
14.28 
14.09 
0.328 
I -507 
1.043 
25 . 
14-35 
14-53 
0.318 
1.518 
1.026 
The supply of various quantities of potash had likewise a very 
marked influence on the content of the crops in this substance. 
The richest were those plants which had received a manure 
consisting of much potash and phosphoric acid but destitute of 
nitrogen, and the poorest were those supplied with, much nitro¬ 
gen and phosphoric acid, but to which no potash had been given. 
In the former case potash was largely in excess among the 
factors of growth, and copiously entered the plants without 
being needed for the production of organic matter; in the 
latter case the plants had at their disposal only the potash 
originally contained in the soil, which was consequently worked 
up to the utmost extent. In these two extreme trials the 
content of potash was as follows (per cent of dry matter):— 
