52 



lowland situations where the water table is close to the sur- 

 face, the trees are very satisfactory for Iowa planting. They 

 will withstand wet soil and make a good growth if the water is 

 not stagnant. The white cedar makes one of the most effective 

 windbreak trees. It stands considerable shading, consequently 

 can be grown closely spaced. 



The Wood : In the United States the white cedar is used 

 for fence posts and poles probably as much as any other tree. 

 The native stands are dense and a large production of these 

 products per acre is obtained. Practically all of the fence 

 posts shipped into the State are white cedcir. The tree 

 is utilized little for other purposes. 



Planting'. The white cedaj? windbreak should only be 

 planted on moist soil. Space trees about 8 by 12 feet apart. 

 With this spacing the lower branches on the interior of a wind- 

 break thirty years old are shaded off but the outside rows pre- 

 sent a solid mass of green foliage. TheNorway spruce is some- 

 times planted in alternate rows with the white cedar and this 

 combination makes a very desirable windbreak, although after 

 twenty-five to thirty-five years the former begins to overtop 

 the cedar. At this time the white cedar trees could profitably 

 be taken out and made into fence posts thus giving the remain- 

 ing spruce more room for development. 



Fig. 15. A shelterbelt composed of alternate rows of white cedar and Nor- 

 way spruce. This combination, if not pastured, makes one of the most effective 

 windbreaks which can be grown in the State. 



