MANURING EXPERIMENTS WITH PADDY RICE (THIRD YEAR). 
II 
from the soil and water, was worked up as completely as 
possible. As to the content of ash we notice the largest 
proportion in the straw without any phosphoric acid in the 
manure, next follows that without nitrogen, and finally comes 
that without potash ; in these three experiments the whole 
produce ranges in inverse order, the smallest crop (without 
phosphoric acid) being thus the richest in ash, the largest one 
(without potash) the poorest, while the straw produced with a 
complete manure, in which case the yield was the largest, 
occupies a medium position as to the content of ash. The 
reasons for these differences are plain, small crops having at 
their disposal more of the mineral manure than large ones, and 
the crop with complete manure receiving a little more mineral 
matter than that without potash. 
The analyses of the ash of the 4 kinds of straw gave the 
following results : 
In 100 parts of ash. 
Complete 
manure. 
Without 
potash. 
Without 
phosphoric 
acid. 
Without 
nitrogen. 
Potash. 
5.19 
1 . 4.5 
5-°3 
5-91 
Soda . 
0.94 
S .33 
0.60 
2.05 
Lime . 
i.01 
1.25 
I - I 5 
1.30 
Magnesia . 
0.68 
0.98 
0.77 
0.25 
Ferric oxide. 
2.63 
3-33 
i -35 
2.23 
Phosphoric acid. 
CT.37 
o -45 
0.1« 
0.36 
Sulphuric acid . 
0.99 
0.81 
IT) 
00 
Ö 
0.32 
Silica . 
87.08 
88.72 
88.92 
86.45 
Chlorine . 
1.74 
1.26 
2.03 
2.00 
Compared with the composition of the ash of the straw from 
the plots with a complete manure we find the lowest proportion 
of potash and the largest content of soda in the case in which 
the manure was free from potash. Soda is capable of substi- 
