1922] Indian Science Congress. I.S.C. 105 
tropical plants. It would be worth whi i 
é ile to have e3 
“a pomgeaas along this line. a 
e factors involved in the acclimatisation of plant 
2 a s from 
other parts of the world is a problem that would sey study. 
Soil fertility offers another immense field for research, in- 
ving as it does both the micro-organisms of the soil, and 
e plants grown in this soil. The problem of soil fertility 
as long engaged the attention of agriculturists, and suck 
studies have gradually settled down along certain traditional 
there i i “ a. ae" neces eee 
2 is coming to be a growing dissatifaction with the results 
— by such methods. Lipman AND Linuart ! and 
~eengerodl have recently concluded that the results obtained 
iy ordinary plots are of such little practical value that they 
not justify the time, energy, and money expended on them. 
a culture methods yield results of great physiological value, 
ut leave many problems unsolved It looks as if we wou 
HOM 
jungles and cultivating the cleared area for 
years derives its advantage from the killing by heat of bac- 
il need extensive 
t in the various soils of 
e, seasonal variation, 
and physiological action. 
On the other hand the reaction of plants to end nanan 
factors of soil fertility needs a vast amount of work. Much 
has been done already. But we should be prepared for strik- 
ing results in increase of plant production in ee eer 
Tea acetate 


study of fertilizer 
and manures. Jour. Agric. Sci. 10 : 415-419. . 1900 : 
India. 0 E. Agriculture in the Shan States. Agric. Jour. 
