30 
MANURING EXPERIMENTS WITH PADDY RICE. 
Moisture 
Phosphoric acid 
in the dry matter. 
Manure per tan : 
Grain. 
7 o 
Straw. 
% 
Grain. 
°/o 
Straw. 
°lo 
Whole 
crop 15 . 
°/o 
Unmanured. 
14.92 
15.80 
0.611 
0.103 
0.240 
No phosphoric acid, 15 kil. nitrogen and 
20 kil. potash. 
15-03 
15-94 
0.618 
0.100 
0.232 
No nitrogen, 25 kil. phosphoric acid, 20 
kil. potash. 
14.36 
15.88 
0.766 
0.115 
°-349 
No potash, 25 kil. phosphoric acid and 15 
kil. nitrogen. 
14.56 
14.70 
0.655 
0.126 
0.314 
Phosphate Series. 
15 kil. nitrogen. 20 kil. potash and the 
following quantities of phosphoric 
acid : 
5 kilogrms . 
14.59 
I 3-44 
0.548 
0.104 
0.245 
10 „ . 
14-31 
14.95 
0 
Ln 
00 
M 
0.123 
0 286 
15 .. . 
M 
00 
14.99 
0.600 
0.145 
0.297 
20 „ . 
14-53 
15.06 
0.631 
0.169 
0.320 
2 5 J> . 
14.28 
14.09 
°- 7 I 4 
0.174 
0.342 
3 ° .. . 
14.56 
16.04 
0.727 
0.176 
0.340 
As the phosphoric acid represents in our soil the minimum 
among the factors of production, it was most completely made 
use of in the plants of all those plots that received either none 
or only moderate quantities of it. Hence we find in the dry 
matter of these crops the smallest proportion of this nutrient, 
viz. 
in the grain.0.618 % 
,, ,, straw.0.100 ,, 
,, ,, whole crop 15 ... 0.232 ,, 
When, however, in consequence of a rich supply the phos¬ 
phoric acid was no longer in the relative minimum among the 
factors of growth, the crops became gradually richer in it, 
proportionately to its amount in the manure, for the same reason 
15 Chaff included. 
