396 
PACIFIC SCIENCE, Vol. XVII, October 1963 
In view of the importance of energy budget 
and water balance in characterizing the regional 
climate, it is a pity that almost all the textbooks 
in English on climatology make no reference to 
the subjects. The Russian work by Budyko 
(1958) is the only general reference. In this 
respect, Thornthwaite’s sustained interest in 
these areas is commendable, and his recent plea 
( 1961 ) should be well heeded. 
3. EFFECT OF CLIMATE ON GROWTH AND 
YIELD: We have demonstrated that determina- 
tion of water balance is a step toward solving 
the climate-and-plant relationship. More field 
experiments are needed, however, to define the 
hypothetical curve as presented in Figure 17. 
Eventually we hope that a method will be de- 
veloped to estimate dry-matter yield and juice 
quality from climatic data. 
It has been argued that climatologists are not 
responsible for the study of the effects of climate 
on vegetation (Trewartha, 1957). To be sure, 
plant scientists are better qualified to run the 
field experiments. But the development of tech- 
niques for evaluating the climatic elements that 
affect plant growth falls squarely within the 
responsibility of a climatologist. Without these 
techniques the meaning of climatic data is often 
obscured. Whoever solves the problem of cli- 
mate-and-plant relationship will contribute work 
of enormous practical value. 
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