SEVERAL NITROGENOUS FERTILIZERS. 
31 
cannot be taken up by the roots. We incline to this assumption, 
because also the following crop (upland rice) was not affected by 
this manure, as will be described hereafter. On account of this 
exceptional circumstance we abstain from drawing at present any 
conclusions on the efficacy of rape cake as a nitrogenous manure. 
A good measure for the manurial value of our nitrogenous 
fertilizers is certainly afforded by the rate of nitrogen assimilated 
from the manure actually applied, on which subject the following 
compilation will yield information. 
Nitrogen 
applied in 
the manure, 
grms. 
Nitrogen assimilated 
from the manure. 
grms. 
7 « 
II. Ammonium sulphate . 
0.848 
o -357 
42.1 
HI. „ . 
1.696 
0,641 
37.8 
IV. Night-soil . 
1.130 
0.467 
41.3 
V. „ „ . 
2.260 
0.938 
41.5 
VIII. Fish manure . 
1-413 
0.695 
49.2 
IX. .. 
2.826 
1.261 
44.6 
X. Steamed bone dust . 
3-391 
1.864 
55.0 
From these results we may"draw the following conclusions : 
1) Easily soluble nitrogenous fertilizers, such as ammonium 
sulphate and night-soil, have less effect than organic nitrogenous 
manures, such as fish manure and steamed bone dust, if their 
whole quantity is applied to winter crops before sowing. A 
considerable proportion of the former is washed by rain down 
into the subsoil beyond the reach of the roots. 5 Japanese 
farmers are fully justified in applying the liquid manure in 3-4 
doses during the chief periods of growth. 
5 Similar observations have been reported by Lawes and Gilbert from the 
experimental farm at Rothamsted, and P. Wagner likewise advocates the 
application of chilisaltpeter and ammonium sulphate in spring. 
