Experiment Stations» 
Rec’rf 
Äns’d 
920b ia 
Manuring Experiments with Paddy Rice. 
(Third Year, 1891.) 
BY 
Dr. O. Kellner, Y. Kozai, Y. Mori, and M. Nagaoka. 
Some of the experiments on rice commenced in 1889 and 
1890, 1 were continued last year, partly to study the exhaustion 
of soil nutrients by successive crops, and partly to ascertain 
the after-action of various phosphates applied in the preceding 
seasons. 
The experiments were carried out in the same fashion as in 
the preceding years. After cutting the rice in November 1890, 
the plots, which comprised an area of 3 square feet surrounded 
by a deep wooden frame, were left untouched till the following 
April, when the soil was turned. In the beginning of June 
they were irrigated and converted into a fine mud, all lumps 
being well crushed. In the mean time young rice plants of 
the variety known as “ koniwa ” which has a medium length 
of vegetation had been raised in the usual way in a seed bed 
and were transplanted after manuring the plots. Each frame 
received 192 healthy plants altogether in 16 bundles of 12 each. 
Irrigation was at once commenced, the water being furnished, 
as formerly, from small tanks of a capacity of about 70 litres 
which were placed on the northern sides of the frames and kept 
constantly filled with water. As to the conditions of the soil 
and water, reference may be made to bulletin No. 8 (p. 3—5). 
In the course of the season the weeds were destroyed several 
times in the usual way, the irrigation having been stopped for 
i Bulletin No. 10, Imperial University, College of Agriculture. 
