MANURING EXPERIMENTS WITH PADDY RICE (SECOND YEAR). 
19 
purpose very well, especially as they increase the stock of 
potash in the soil. The lime or ashes may be put into the soil 
a fortnight, superphosphate and precipitated phosphate 3—4 
days, before transplanting, the Thomas phosphate as early 
as possible, and as this fertilizer is rich in calcium compounds, 
the dose of lime may be somewhat reduced. Several days 
after the final irrigation, genge is sown broad-cast and 
rather thickly, and during the winter the field must be kept 
dry and the plants covered with a little straw. In the follow¬ 
ing spring when the genge is in full blossom it is cut, well 
mixed with the soil, which should not be irrigatad too early 
lest the decomposition of the green manure be retarded. 
Before transplanting the rice, again some phosphatic manure, 
about 4 kilogrms. of available phosphoric acid per tan should 
be applied. If the genge has grown normally, no other manure 
will be required. 
IV. Series. 
COMPARATIVE EXPERIMENTS ON THE 
EFFECT OF VARIOUS PHOS¬ 
PHATES ON RICE. 
These experiments were carried out on 57 plots newly 
arranged in a section of the paddy field of the college farm. 
The condition of the soil and the water used for irrigation were 
the same as in the researches of 1889. The following phos¬ 
phatic fertilizers were applied : 
1) Sodium phosphate containing 19.79 % phosphoric acid. 
2) Double superphosphate with 47.84 % total phosphoric acid, 
of which 43.65% was soluble in water, 3.08% soluble in 
neutral ammonium citrate solution, and 1.1% soluble in 
mineral acids. 
3) Precipitated calcium phosphate with 29.35% total phos- 
