United States Department of Agriculture. 



BUREAU OF FORESTRY. Circular No. 30. 

 GIFFORD PINCHOT, Forester. 



EXHIBIT OF FOREST PLANTING IN WOODLOTS AT THE LOUISIANA 

 PURCHASE EXPOSITION. 



To illustrate different methods of forest planting in woodlots the 

 Bureau of Forestry has prepared, as a part of its outdoor exhibit at 

 the Louisiana Purchase Exposition, a series of plats, each 24 feet 

 square, planted with different species and mixtures suitable for differ- 

 ent parts of the United States. 



Woodlot plantations are made primarily for the production of fuel 

 and timber, rather than for protection. In distinction from a wind- 

 break, in which, since the first requirement is an effective barrier 

 against the wind's force, the trees ma}' often be unevenly distributed, 

 or too closely planted Jor the best development of their form, the 

 individuals of each species in a woodlot are distributed over the ground 

 as evenly as possible, considering the necessity for cultivation, and all 

 the trees are set at the density which will secure the largest yield of 

 timber. In either kind of plantation the spacing between the rows 

 will depend very largely upon whether or not long-continued cultiva- 

 tion is desirable, and the amount of cultivation necessary is conditioned 

 upon the region in which the plantation is located. 



The choice of species for a windbreak is made more with reference 

 to their constitutional vigor, size and density of crown, and immunity 

 from climatic injuries than to the quality of their timber, which in the 

 case of the woodlot becomes the determining consideration. The 

 woodlot plantations at the Exposition representing different regions 

 have been made as types of the best combinations, but are not intended 

 to exhaust the possibilities; since limitations of space make it impos- 

 sible to show. all of the many hundreds of useful mixtures that might 

 have been devised. 



There is an erroneous popular impression abroad that the value of 

 seedlings for planting is directly proportional to their size. Small to 

 medium -sized seedlings cost less, are less expensive to plant, and are 

 more certain to grow than the larger sizes, while the use of the latter 

 does not secure any larger returns at the time of the maturity of the 

 crop. A good size for planting is that used in the Exposition woodlot 



plats, 12 to 18 inches tall. 



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