MANURING EXPERIMENTS WITH PADDY RICE (SECOND YEAR). 
9 
1889. 1890. 
Taken up, per cent of the phos¬ 
phoric acid applied .1 g .10.1 
Thus, while in the unfavourable season of 188g almost 20 % 
was taken up by the plants, only half that amount was 
consumed in the succeeding year. It is very probable that 
this difference may be accounted for by the conditions of heat 
and light which accelerated in 1890 the maturity of the rice 
and thus rendered impossible any considerable surplus con¬ 
sumption of phosphoric acid. The lower percentage content 
of this nutrient in the dry matter produced this season, at least 
intimates that there was a surplusage of phosphoric acid in the 
crop of the preceding year. 
Lastly, as to the consumption of potash from the soil, we 
obtained the following results : 
Potash 
taken up 
from the 
Potash in 
the dry 
Potash in soil, resp. 
matter of the 
the 
from the 
whole 
crop. 
manure. 
soil and 
-- 
grms. 
manure. 
C /° 
grms. 
grms. 
Unmanured, 
1889 
.0.705 
1.89 
0 
1.70 
1890 . 
. .0.886 
4-65 
0 
4.00 
Without potash, 
1889 
..0.429 
4.78 
0 
4-59 
n n 
1890 . 
..0.386 
4-32 
0 
3-67 
Complete manure, 
1889 6 . 
..0.710 
9-25 
g. 18 
9.06 
J > >> 
1890 . 
..0.770 
10.17 
9.18 
9-52 
The plants supplied with 
nitrogen 
and phosphoric acid, but 
left without potassic 
manure, 
did not 
find so 
much 
potash in 
1890 as in the preceding season, although in the latter season 
the consumption of this nutrient appears to have been specially 
favoured, as is illustrated by the results on the unmanured 
plots and on those which had received a complete manure. 
Doubtless, the exhaustion of potash was in 1889 so great that 
6 Average of plots 48, 58, and 73 of 1889. 
