4 
MANURING EXPERIMENTS WITH PADDY RICE (THIRD YEAR). 
Straw. 
Full grain 
Empty- 
grain. . 
Whole 
crop. 
grms. 
grms. 
grms. 
grms. 
1889 ; variety Satsuma. 
Unmanured. 
.197 
106.4 
6-5 
309-9 
Without nitrogen 
•459 
367-3 
15-3 
841.6 
,, phosphoric acid.. 
•193 
89.7 
6-5 
289.2 
,, potash. 
• 7 I 4 
564.0 
23.8 
1301.8 
Complete manure 
.S32 
575-1 
3 '-i 
1438.2 
1890; variety Shiratama 
Unmanured. 
• - 3 2 5 
277.0 
2.1 
604.1 
Without nitrogen 
••536 
412.7 
3-2 
951.9 
,, phosphoric acid. 
••358 
260.9 
2.6 
621.5 
,, potash .. 
•• 77 ° 
582.5 
8.2 
1360.7 
Complete manure 
••975 
638.1 
7.6 
1620.7 
In the three experimental years the lowest yield was in¬ 
variably obtained on the unmanured and those plots which had 
not received any phosphatic fertilizer, and this result proves that 
in our soil the phosphoric acid is in the relative minimum 
among the three essential nutrients. Then follow the plots 
which were not supplied with nitrogen ; though the stock of this 
nutrient in our soil suffices for a considerable produce, it does 
not provide enough for the maximum yield. The quantity of 
soil potash, too, is not sufficient for the highest obtainable pro¬ 
duce, but of the three nutrients under discussion its proportion 
is the largest. 
Comparing the yields of the three years we do not find great 
regularity, the produce of 1890 exceeding in general that of the 
two other seasons. This difference is, however, simply explain¬ 
ed by the differences of the weather, variety, and particularly 
by the condition of the plants brought up in the seed bed which, 
in 1890 were about three times as large and heavy as in the 
two other seasons ; this is seen in the following record on the 
content of the young plants per plot : 
