210 
REPORT ON RICE AND COTTON INVESTIGATIONS 
IN CHINA AND JAPAN. 
By F. G. Krauss. 
(Continued from June issue.) 
III. Fertilization Experiments. 
Special inquiry was made as to the investigations on the fertili- 
zation of rice. The principal work along this line has been 
done at the Central Experiment Station at Nishigahara, and at 
the Imperial Agricultural College near Tokyo. 1 spent several 
days at the former institution, to familiarize myself as much as 
possible with their work and methods. The results obtained by 
them have largely been published, and as I was able to obtain 
most of the publications, the work is only briefly touched upon 
here, and a fairly complete bibliography of the published data is 
added to the end of this paper. 
Probably no other line of research has been so fully developed 
in the colleges of agriculture and experiment stations of Japan 
as that of agricultural chemistry. The work follows the German 
school closely, and the influence of the teachings and work of 
Kellner, Loew and other German investigators in Japan is very 
evident in all their methods. The fact that more than half their 
work, published in foreign languages, appears in German gives 
further evidence of German influence. Many of the Japanese 
investigators have studied in Germany. Their references are 
largely to German works, and they speak that language more 
fluently than they do English. 
Much of their fertilization experiments are made with pot cul- 
tures, after the Wagner method. So efficient did this method 
appear to the writer, that a careful study was made of it with 
the idea of introducing it in our own work. The officials of 
the Central Experiment Station presented a sample pot of the 
most approved form and on consultation with the Station chem- 
ist, it was decided to secure flfty pots from Japan. Thirty of 
these pots were received in time for our spring experiments and 
are now in use. 
The following description of the pot ( and accompanying photo- 
graph) may be helpful to others desiring to adopt this culture 
method. The pot is of high grade porcelain, glazed inside and 
outside. It is ten inches in diameter and twelve inches in height, 
inside measurement. A hole for drainage and separate hole for 
sub-irrigation are provided at the bottom. These openings are 
protected by porcelain guards, and the space in front and to an 
inch above, are filled with coarse gravel, coated with half an 
inch of clean quartz sand, to prevent the soil from filtering 
through. 
