8 



The section of windbreak west of field C, 50 feet 6 inches long, is 

 planted with a mixture suitable to the Red River Valley of the North, 

 eastern South Dakota, and western Minnesota, consisting of equal 

 parts of jack pine and white spruce arranged in accordance with the 

 following diagram: 



Diagram, No. 8. 

 JP S JP S JP S 

 S JP S JP S JP 

 JP S JP S JP S 



JP=Jack pine (Pinus divaricata) ', S=White spruce (Picea canadensis). 

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



The section of windbreak west of field B, 50 feet 6 inches long, is 

 planted with a mixture suitable to the orange-growing districts of 

 southern California, consisting of equal parts of blue gum and Monte- 

 rey cypress, arranged in accordance with the following diagram: 



Diagram No. 9. 



BG MC BG MC BG MC 

 MC BG MC BG MC BG 

 BG MC BG MC BG MC 



BG = Blue gum (Eucalyptus globulus) ; MC= Monterey cypress (Cupressus macrocarpa). 

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



Approved: 



JAMES WILSON, Secretary. 



WASHINGTON, D. C., April 30, 1904. 



O 



