98 



THE FACTORS 



[Part ]' 



ANALYSIS OF ASH OF PINUS PINASTER ON DIFFERENT SOILS IK 

 THE FOREST OF CHAMPFJETU (after Fliche and Grandeau). 



Films Pinaster. V. Laricio. 



leaves and wood were analysed separately. 



ANALYSIS OF ASH OF CASTANEA VESCA ON DIFFERENT SOILS 

 IN THE FOREST OF CHAMPFETU (after Fliche and Grandeau). 



Leaves. Wood. 



Silicioussoil. Calcareous soil. Silicioussoil. Calcareous soil. 



Silica 



Phosphoric acid 



Lime 



Magnesia. 



Potash 



Soda 



Ferric oxide 



Sulphuric acid . 



Chlorine . 



Total 



Ash % . 

 The most striking po 



5-79 

 12-32 



45-37 

 6-63 



21-67 

 3-86 

 1-07 



2-97 

 0-30 



99.98 



1-46 

 12-50 



74-55 

 3-70 

 5-76 

 066 

 0-83 

 0-00 

 0-52 



99.98 



3-08 



4-53 

 73.26 



3-99 

 11-65 

 0-00 

 2-04 

 1-43 



99-98 



1-36 

 4-27 

 87.30 

 2-07 

 2-69 

 0-28 

 1-27 

 0-64 

 0-08 



99.96 



4-80 7.80 4-74 5-71 



int in these tabular statements is the great diffei 

 ence in the quantities of Hme and potash. Trees groivn on silieious so 

 are much richer in potash and poorer in lime than those grozmi 

 calcareous soil. 



The authors draw from these observations the conclusion that abundanc 

 of lime in the soil retards the absorption of potash, ivhereas it accelerati 

 the absorption of lime and thereby produces an anomalous condition the 

 is prejudicial to the plants. 



The different percentages of ferric oxide in the ashes is perhaps significan 

 altliough it is less striking on account of the small quantities under considerr 

 tic 11. Maritime pine and stveet-chestnut on calcareous soil arc much poore» 

 especially in their leaves, in ferric oxide than on silieious soil. I f we conside 



