Yearbook of Agriculture 1949 



ramidal English oak, the columnar 

 sugar maple, and the vegetatively 

 propagated male ginkgo tree. Until 

 cities all over the country, by their 

 purchases, encourage the propagation 

 of these and other desirable but little- 

 used varieties, the growers will be 

 forced by hard economics to confine 

 their efforts to the more common and, 

 in many cases, less desirable kinds. 



In summary, several fundamentals 

 are to be borne in mind if our cities 

 are to have good trees. 



First: Hire a competent landscape 

 architect or arborist, one who knows 

 the esthetic and practical problems of 

 city tree planting. He is the key man 

 in a successful program: He knows 

 what varieties will or will not grow in 

 any given location, how they will look 

 at maturity, how far apart to plant 

 the trees, and what soils will sustain 

 them. He will use tree forms to create 

 the desired effect. 



Second: Select only those varieties 

 adapted to your local conditions. 



Third : Buy only the best obtainable 

 materials; cheap, substandard trees 

 are usually expensive in the end. 



Fourth: Insist on proper planting 



to rigid specifications under the super- 

 vision of a competent plantsman. 



Fifth : Spray, feed, water, and prune 

 whenever necessary ; perform these op- 

 erations according to the latest scien- 

 tific methods. Adequate maintenance 

 is vital to the continuing survival and 

 good health of trees and is as necessary 

 as good original design and planting. 



Sixth: Keep in sight the goal 

 beauty and livability. A city of trees 

 is a better place in which to live. 



IRVING G. ROOT is superintendent of 

 National Capital Parks, Department of 

 the Interior. He has degrees in horti- 

 culture and forestry from Kansas State 

 College and in landscape architecture 

 from Massachusetts State University. 

 He was formerly chief engineer for the 

 Maryland National Capital Park and 

 Planning Commission. 



CHARLES C. ROBINSON is a gradu- 

 ate in landscape architecture of Penn- 

 sylvania State College and has devoted 

 20 years to the practice of his profession. 

 He has specialized in the development 

 of home grounds. He is a landscape 

 architect with National Capital Parks 

 in Washington. 



SHADE TREES FOR THE NORTHEAST 



ALMA M. WATERMAN, R. U. SWINGLE, CLAYTON S. MOSES 



Throughout the Northeastern States, 

 the maples, the elms, and the oaks have 

 long been preferred for shade trees. 

 The elms in this region, however, are 

 threatened by two serious diseases. In 

 the northwestern part a wilt disease 

 impairs the value of red oaks for shade- 

 tree planting. Fortunately, there are 

 still many kinds of beautiful native 

 trees and some introduced kinds that 

 make satisfactory shade trees. 



Some of the outstanding deciduous 

 shade trees that can be recommended 

 for residential and suburban sections, 

 primarily because of their tolerance of 

 city conditions, are : Sugar maple, Nor- 

 way maple, red maple, white oak, pin 



oak, northern red oak, scarlet oak, 

 Texas oak or Shumard oak, thornless 

 common honeylocust, sweetgum, gink- 

 go, American sycamore, London plane- 

 tree, common hackberry, black tupelo, 

 green ash, silver linden, littleleaf linden, 

 Kentucky coffeetree, yellow-poplar 

 or tuliptree, the American yellow- 

 wood, Japanese pagodatree, and Amur 

 corktree. 



In heavily congested and industrial 

 areas the following species may be 

 used: The ginkgo, the thornless com- 

 mon honeylocust, London planetree, 

 ailanthus or tree-of-Heaven, and the 

 Amur corktree. 



In the Northeastern States, a large 



