FOOD FOR PLANTS 



153 



benefit is not ordinarily to be expected in young cul- 

 tivated orchards where cover crops are being used. 

 Nitrogen may be applied in the form of a leguminous 

 cover crop, of manure or of commercial fertilizers. 

 Nitrate of Soda is one of the most common and useful 

 forms of chemical plant food. It becomes immedi- 

 ately available to the tree, and encourages an early 

 and vigorous growth. 



Renovated Baldwin Tree in Orchard at Conyer's Farm. 

 Greenwich, Connecticut. 



"In connection with all fertilizing problems, in- 

 deed, as well as with other orchard matters, a close 

 observation of the trees is desirable. The experi- 

 enced grower knows by the length of terminal 

 growth, the color of the bark and of the leaves, and 



