28 

 TABLE XI. 



Location Total acid radicles Chlorine 



9 J. 771% 1.178% 



1 .301 .137 



10 .326 .188 



2 .142 .043 



3 .198 .114 



4 .198 .119 



5 .085 .026 



11 .071 .017 



6 .079 .014 



7 .037 .016 



8 .033 .011 



We find that here the figures for total acid radicles are not as regular 

 as in table X, but these discrepancies are only apparent, and, in fact, 

 help to explain the condition of the came from the respective places. 



In the discussion which follows we shall take up each location 

 separately , and study the relation between the salt content of the soil and 

 the condition of the cane. The dscription of the condition of the cane in 

 the different places is due to Mr. Johnston. 



9. In this location cane had been planted for the first time, and it 

 was either dead or dying. There is no doubt that the high percentage 

 of salts was iaigely responsible for this (1.178% of chlorine and 1.111% 

 of total acid radicles.) 



1. Here the plant crop for 1910 produced only 27.8 tons per acre, 

 notwithstanding the land had been in cultivation only 6 years. Fertilizer 

 had never been applied. In the adjacent field of old cane there was a 

 small amount of root disease, and very few insects. Some stools showed 

 absolutely no root disease, while in others it was confined entirely to a 

 few small dead shoots. The root system was well developed but many of 

 the roots were dead indicating either injurious parasites or a bad 

 condition of t he soil as to constitution or texture. Parasites were not 

 present in sufficient amount to account for any injury to the cane. It 

 must be noted here that the soil was comparatively shallow and that the 

 subsoil with its high chlorine content of 0.18% came in contact with the 

 lower part of the root system. As the amount of the salts present 

 increases and decreases at any given point according to the rise and 

 fall of the water level it will be readily seen how a good root system 

 may have developed but subsequently bcame injured. The soil was ap- 

 parently rich in plant food but of rather close consistency. Altogether the 

 physical condition of the soil may have had a small part in preventing 

 e, big crop of cane, but the matter of fungus or insect enemies may be 

 entirely eliminated, leaving the majority of the blame to the salt content 

 which amounted to a total of .301% acid radicles, .137% being chlorine. 



