

Required number of rows and trees of each species per acre. 



The entire windbreak belt west of field A (fig. 1) is planted with a 

 mixture suitable to the arid plains of western Kansas, eastern Colo- 

 rado, western Oklahoma, northwestern Texas, and eastern New Mex- 

 ico, consisting of green ash, Russian mulberry, black locust, and white 

 elm, arranged in accordance with the following diagram: 



Diagram No. 2. 



A M A M A M 



L E L E I, E 



A M A M A M 



L E L E L E 



A = Green ash (Fraxlnus lanceolata} ; M= Russian mulberry (Jfonw alba tatarica); 

 L=Black locust (Robiniapseudacatia); E=White elm ( Ulmus americana). 



Required number of rows and trees of each species per acre for this windbreak. 



To illustrate a plantation suitable for the Middle Western States 

 east of the Mississippi, a section 58 feet 8 inches long of the south 

 windbreak immediately south of the farmstead is planted with a 

 mixture of black walnut and sugar maple in equal proportions, in 

 accordance with the following diagram: 



Diagram No. 3. 



W SM W SM W SM 



SM W SM W SM W 



W SM W SM W SM 



W=Black walnut (Juglans nigra); SM= Sugar maple (Acer saccharum}. 



