Winter Meeting. 



395 



Apples, peaches, plums and pears. 



Potash is present in the fruit in larger quantities than is any other 

 plant food constituent ; nitrogen coming second and being present to 

 the extent approximately, of one-half the amount of potash. Then 

 follow, in order, phosphoric acid, magnesia and lime, all of the.se being 

 present in much smaller amounts. 



In the leaves, the plant food constituents used per acre are great- 

 est in the case of the peach, the apple coming second, then the pear and 

 plum. 



Lime is present in the leaves and also in the new wood in much 

 larger quantities than any other plant food constituents ; nitrogen com- 

 ing second, followed in their order by potash, magnesia and phosphoric 

 acid. 



In the new wood, the plant food constituents used per acre are 

 greatest in the case of the peach trees, after which comes in their 

 order plum, pear and apple. 



THE AMOUNTS OF PLANT FOOD REQUIRED BY AN ACRE OF BEARING Al'i'LE 

 TREES COMPARED WITH OTHER FARM CROPS. 



It will be interesting to note the following comparison between the 

 amount of plant food used per acre for trees in full bearing as already 

 reported, and the amount of material ordinarily used by the different 

 farm crops, as shown in the following table : 



AMOUNTS OF PLANT FOOD USED PER ACRE BY BEARING APPLE TREES AND 



OTHER FARM CROPS COMPARED. 



