BULLETIN 318 TH E EFFECTS OF ALKALI ON CITRUS TREES 



313 



The data in tables 4, 5 and 6 show that the salts have evidently 

 penetrated to considerable depths. Samples were taken in three groves 

 to a depth of seven feet, two of which have been irrigated with saline 

 water (No. 643), the other with comparatively pure water (No. 84). 



Fig. 1. Orange trees irrigated with saline water, No. 643. 



Fig. 2. Ora 



>. 84. 



The analyses establish the fact that Ihe salts have penetrated deeply. 

 The data, suggest that the penetration has even reached deeper than 

 seven feet, bill samples have not been drawn from greater depths. 



The analyses of samples from the different groves that have been 

 irrigated wilh pure water indicate (hat the original soil must have 

 varied considerably. The variations are not surprising, however, since 



