40 



OHIO EXPERIMENT STATION: MONTHLY BULLETIN 



the trunk. If properly spaced when planted crowding would have 

 been avoided, little or no pruning needed and the lives of the trees 

 would have been very much prolonged. 



As to the distance for spacing trees along roads, streets and 

 avenues, the interval between the individual specimens will depend 

 much upon the species and somewhat upon the width of street or 

 road. Along most streets the trees have been planted too closely 

 and very little thinning has been done, hence the presence of tall, 

 pinched, ill-shapen maples and elms in unlimited numbers. Very 



Normal development can only be secured when trees are properly spaced 



large trees, such as white elm and red oak, should be spaced 60 feet 

 for the former and 45 to 50 feet for the latter. A space of 45 feet 

 will suffice for most other oaks. Tulip tree and cucumber tree 

 should be given 50 feet. American white ash and pin oak should 

 stand 30 or 35 feet. Sugar maple and silver maple should have 40 

 feet. Ginkgo and liquidambar ought to have a space of 30 feet. 

 Theoretically, the plan of spacing closely and thinning by taking 

 out alternate trees when they begin to crowd is a most admirable 

 one, but reluctance to thin them at the right time generally defeats 

 the original good intentions of the planter. 



Care of young trees and planting. A few words as to the pro- 

 cess of planting may not be amiss. When received from the nur- 



