LAWN TREES. 



ii 



may then be allowed to grow, altho it is advisable to maintain the 

 opening continually as a guard against injuring the base of the tree 

 by the lawn mower. 



"Wells" and mounds. If the level of the ground about an old 

 tree is changed a "well" must be built in a fill to keep the soil away 

 from the trunk and to avoid smothering the roots, or a mound left 

 on a cut to prevent exposure. 



& 



Fig. 7. Four Types of Tree Guards. 

 A Standard in Washington, D. C. Made of Wood and Very Strong. It 



Also Serves as a Support, but is Unsightly and Not Cleanly. Cost 



About $1.50. 

 B Made of Ornamental Fence Wire. Too Frail to be of Much Value 



as a Guard and of None as a Support. Cost About $1.00. 

 C Made of Heavy Wrought Iron. Is Attractive, Strong and Durable. 



Cost With Grill About $10. 

 D Made of 1-2 inch Galvanized Iron Screen, with Rubber Hose Buffer at 



Top. Harbors Insects and Must be Supplemented by a Supporting 



Stake, but Very Popular. Cost About 80 Cents. 



Seashore Trees 



Whether along the streets or upon lawns, trees near the ocean 

 have to contend with poverty of soil, deficient soil moisture and 

 strong winds, those of winter in particular. It is useless to try to 

 maintain trees where they can be reached by ocean spray say with- 

 in 200 feet of high water. Beyond that point it is simply a question 

 of choosing hardy species and strengthening sterile soil. 



