PRUNING AND TRAINING PLANTS 65 



geons" should be chosen with great care and should be 

 impressed with the fact that plants should be treated for 

 permanent vigor and natural growth, and not for quick 

 results gained by the use of stimulants which might be harm- 

 ful. Too high nitrogen may appear to be very beneficial for 

 a few months, but it may cause an earlier death of the plant. 

 To prolong the lives of trees, decays and injuries can usually 

 be repaired by tree surgeons, who remove infected areas and 

 treat the cavities to prevent further infection. 



REFERENCES 



Bailey, L. H., The Pruning Manual,"The Macmillan Co., 1925. 



Publications covering special plants from your State or Federal Department of Agri- 

 culture. 



