39 



much humus is rich in available nitrogen and unless 

 potash and phosphate is supplied artificially the growth 

 is liable to go 'to wood instead of fruit. Also the growth 

 is liable to be unhealthy, the wood soft and the tree 

 attacked with gummosis. 



What fertilizing will do in different soils and under 

 varying conditions is best illustrated by photos, and 

 those shown in this pamphlet are absolutely true. Any 

 planter can duplicate the experiments by trying for him- 

 self, using the formulas recommended here. 



INFLUENCE OF FERTILIZERS ON THE FRUIT 



While it is fairly well known what fertilizers will do 

 in regard to tree growth and fruit production, the tre- 

 mendous influence on the quality of the fruit and time 

 of ripening is not generally recognized. This is probably 

 due to ithe fact that experiments have been conducted' 

 principally on light soil and the influence seems to be 

 more noticeable on heavy soil. 



Following we give some results: At the exhibition 

 held by the Cuban National Horticultural Society, Jan- 

 uary 1909, some oranges were exhibited by Mr. D. H. 

 Howell of Ceiba Moc'ha, which were commented on as 

 being insipid and stale. It was decided to try and remedy 

 this and in June, 4 Ibs. high grade sulphate of potasJi 

 was applied per tree on 40 trees. The soil was a red clay, 

 fairly deep, underlayed with coral rock. The grove was 

 not well cared for that summer on account of the owner's 

 absence, and it was found necessary to pick the fruit 

 early to prevent it from being stolen. The data was taken 

 in December and several people were asked to give their 

 opinion on the quality of the fruit. All who tasted it 



