38 
MANURING EXPERIMENTS WITH PADDY RICE (SECOND YEAR). 
especially as regards the urine which is mostly lost from the 
stable. Rice brans, green manure, and straw when freshly 
applied, as in our experiments, injure the plants through 
formation of acid and reducing processes. They should ac¬ 
cordingly be invariably fermented before their application or 
put into, and mixed with, the soil several weeks before trans¬ 
plantation. If thus treated rice bran will probably be not 
much less effective than the rape cake was in our experiments. 
In general, for rice fields the preparation of good compost 
deserves to be much recommended. 
Referring then to the consumption of nitrogen by the crops, 
we find that plants grown on the plots without nitrogenous 
manure contained 7.98 grms. of nitrogen per plot, and as 1.77 
grms. were contained in the plants from the seed bed, the 
amount of soil nitrogen consumed per frame was 6.21 grms. 
= 7.45 kilogramms per tan. In the crops supplied with 3.45 
grms. of nitrogen in the form of various fertilizers we found 
the following amounts, from which we calculate how much was 
consumed from 100 parts of the nitrogen applied. 
Nitrogen in 
Consumed 
Consumed 
the whole 
from the 
per cent of 
crop. 
manure. 
the nitrogen 
grms. 
grms. 
applied. 
Steamed bone dust. 
10.96 
00 
q* 
Hoshika . 
io -35 
2-37 
SO 
Shimekasu. 
10.77 
2.79 
Blood meal. 
10.82 
2.84 
Crude bone dust .. 
10.51 
2-53 
Shöchü cake . 
10.45 
2.47 
72 
Horn meal. 
10.42 
2.54 
Peruvian guano. 
10.45 
2-47 
Shôyu cake. 
10.23 
2.25 ! 
67 
Rape cake. 
10.32 
2.34 i 
Night-soil. 
10.26 
2.28 
66 
Ammonium sulphate . 
10.10 
2.12 
6 l 
Farmyard manure . 
9.70 
1.72 
5° 
Rice bran. 
8.88 
0.90 
26 
Green plants . 
8.76 
0.78 
23 
