COMPARATIVE EXPERIMENTS ON THE EFFECT 
OF VARIOUS PHOSPHATIC MANURES 
ON UPLAND SOIL. 
BY 
J Piec’d-- 
930526 
Dr. 0. Kellner, Y. Kozai, Y. Mori, and M. Nagaoka. 
For the sake of comparison with a series of experiments on the 
effect of various phosphates, commenced in the spring of 1890 in 
the irrigated paddy field of the college farm 1 , we arranged in the 
following autumn similar experiments on the upland soil. 
So far as the chemical composition and physical properties of 
the two soils are concerned the difference between them is not 
great. Both consist of volcanic ash mixed with sand, they are 
both rich in easily decomposable silicates of aluminium, ferrugi¬ 
nous compounds and humus, they are both endowed with a high 
absorptive power for ammonia and phosphoric acid and retain the 
moisture well ; in general they are both characterized as light, 
ferruginous kinds of loam rich in humus. While the paddy fields 
are, however, irrigated every summer for about 3 months, and 
remain, owing to their low situation, rather wet during the other 
part of the year, the surface of the upland speedily dries up even 
after long-continued heavy rains, but retains moisture enough to 
protect the crops from being injured by draught. 
According to analysis made in 1882 in conjunction with Mr. //. 
Imai the two soils contained in the air-day state 2 : 
Dry land. 
Paddy 
Hygroscopic water. 
.1549 
I4.3O 
Loss on ignition . 
. 2001 „ 
22.30 
Humus . 
. 7 - 9 ° 
0.96 
Nitrogen . 
. .. 0.80 „ 
0.49 
Combined water . 
.11-31 
n.85 
i. Sse our bulletins No. 9 and 11. 
2. Landwirtschaftliche Versuschsstationen, vol. 30. p. 1. 
