of 5 rods on the real farm, besides making forest conditions possible 

 within the plantations, is sufficient to provide a home supply of fuel 

 and timber, while the location of the belts at the sides and ends of 

 the fields does not interfere with the tillage of the land. A space of 

 9 feet 8 inches is allowed between each timber belt and the adjacent 

 hedge, for convenient access and cultivation. 



Each windbreak and section of a windbreak on the model farm at 

 the Exposition represents a mixture suitable to a definite region, but 

 this should not be taken to be the only mixture adapted to the region. 

 The number of available species and useful combinations far exceed 

 the possibilities of illustration in the allotted space, and many which 

 are not shown at all might have been used just as well as those chosen. 



The windbreak at the north side of the farmstead on the model 

 farm (fig. 1) is planted with a mixture suitable to the prairies of 

 Wisconsin, Minnesota, and Iowa, consisting of alternating rows of 

 Austrian pine and Norway spruce. 



The following table shows the required number of rows and trees 

 on a windbreak belt 5 rods wide and 1 acre in area as it would appear 

 in actual practice: 



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



On the west side of the farmstead (fig. 1), illustrating a mixture 

 suitable for the New England and the Great Lake States, are planted 

 alternating rows of European larch and white pine, arranged in 

 accordance with the following diagram: 



Diagram No. 1. 



EL EL EL EL EL EL 

 WP WP WP WP WP WP 

 EL EL EL EL EL EL 

 WP WP WP WP WP WP 

 EL= European larch (Larix europsea); WP= White pine (Pinus strobtis). 



