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

 planted with a mixture suitable to the arid upland prairies of western 

 Nebraska and the western two-thirds of the Dakotas, consisting of 

 rows of Russian wild olive, western } T ellow pine, and green ash, 

 arranged in accordance with the following diagram: 



Diagram No. 6. 



A 

 El 

 YP 



A 

 El 

 YP 



A 

 El 

 YP 



A 



El 

 YP 



A 

 El 

 YP 



A 

 El 

 YP 



A=Green ash 



x lanceolata}; El=Russian wild olive (Elseagnus angustifolia) ; 

 YP= Western yellow pine (Pinus ponderosa] . 



]ic<jiiircd number of rows and trees of each species per awe. 



The section of the windbreak west of field D, 50 feet 6 inches long, 

 is planted with a mixture suitable to the river bottoms of southern 

 Missouri, Arkansas, Kentucky, and Tennessee, consisting of equal 

 parts of yellow cottonwood and sweet gum, arranged in accordance 

 with the following diagram: 



Diagram No. 7. 



SG YC SO YC SG YC 



YC SG YC SG YC SG 



SG YC SG YC SG YC 



SG=Sweet gum (Liquidamhar styraciflua}; YC= Yellow cottonwood (Populus 



deltoides) . 



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



