78 THE AGRICULTDRAL CHEMISTET OF CACAO, 



:and that a plantation of trees of this age growing on one acre 

 ■will contain — • 



Nitrogen ... ... ... 201 S>9. 



Phosphoric anhydride ... 95 „ 



Potash ... ... ... 251 „ 



Lime ... ... ... 400 „ 



Magnesia ... ... ... Ill ,, 



■whilst the so-called suckers and other young shoots trimmed 

 annually from the trees contain* — 



Nitrogen ... ... ... 84 lbs. 



Phosphoric anhydride ... 49 „ 



Potash ... ... ... 42 „ 



Lime ... ... ... 66 „ 



IVfaghesia ... ... ... 20 „ 



' These together with the leaves which he states contain — 

 Nitrogen ... ... ... 39 fts. 



Phosphoric anhydride ... 75 „ 



Potash ... ... ... 30 



Lime ... ... ... 32 „ 



Magnesia ... ... ... JQ 



are practically in all cases yearly returned to the soil. 



The fruit, of which the husks may or may not be returned 

 to the soil according as to whether the pods are or are not 

 broken on the field, are estimated to remove as follows : 



If whole fruit removed If the pods are broken 

 from the field. and left in the field. 



Nitrogen ... 15-5 87 lbs. 



Phosphoricanhydride 7-9 4-,5 



Potash ... 221 37 



Lime ... 6 5 1 4 



Magnesia ... 2-3 10 



* This estimate appears to be excessive. 



