332 OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE I 



UNSATISFACTORY AND SATISFACTOEY TYPES OF THE TREE KELT 



Fig. 1. — A narrow tree belt. When the space allotted to the trees is nar- 

 row, not only do the trees suffer from insufficient aeration of the soil and 

 inadequate water, but the arrangement necessitates placing the tree near the 

 edge of the paving where it is particularly susceptible to injury by horses and 

 other agencies. Nearly every tree in this row was injured in one way or 

 another and their growth and appearance as a result, was very unsatisfactory. 

 A better arrangement of this tree belt and sidewalk, since so little space was 

 allotted for trees when the street was laid out, would have been to have placed 

 the sidewalk next to the curbing and to have planted the trees in the resulting 

 wider tree belt between sidwalk and fence. 



Fig. 2. — This tree belt, almost 8 feet wide, allows a better opportunity for 

 tree development, and at the same time removes the trees a sufficient distance 

 from the pavement that the danger of injury by horses is almost negligible. 

 Little temptation exists here to use the trees as hitching posts. 



