Abstract
No simple mathematical function was found to represent the regression of sugar content on fertilizer rate. The correlation between cane yield and sugar percentage was a good measure for judging sugar percentage for a given rate, at least for correlation coefficients within the region 0.8 and 0. Other values pointed to serious aberrations. Large negative values of the regression coefficient of the term of the second degree and small values of that of the third degree corresponded to low correlation. If so, correlation coefficients calculated from the data, ignoring those from the lowest rate, were more useful.
If more than 30% of the cane lodged, the mathematical function was not satisfactory.
Original language  Dutch 

Qualification  Doctor of Philosophy 
Awarding Institution 

Supervisors/Advisors 

Award date  18 Apr 1947 
Place of Publication  Amsterdam 
Publisher  
Publication status  Published  1947 
Externally published  Yes 
Keywords
 plant nutrition
 fertilizers
 manures
 ammonium sulfate
 saccharum officinarum
 sugarcane
 java
 reports
 indonesia
 netherlands east indies