24 



BULLETIN 153, U. S. DEPARTMENT OF AGRICULTURE. 



Cottonwood cordwood is difficult to split after it becomes dry, but 

 considerable quantities, in addition to lumber, are produced in groves 

 or in rows. A value of $2.50 per cord on the stump is considered a 

 fair average for the tree throughout the region in which it has been 

 planted most extensively. 



Cottonwood is easily propagated from cuttings. It has done well 

 in Iowa, and probably would thrive throughout the whole eastern 

 region, ev^en to the New England States. 



Table 3 gives the yield and value of cottonwood in Iowa. In this 

 table and in the tables for the other species the total costs to date 

 are determined by means of the formula, Cost = (S + E + C) 

 1.0p n (S + E), where S = average value of land per acre, E = capi- 

 talized value of taxes= x nni l a '. , axes ^, C = cost of initial operations 



rate 01 interest 



(preparation of soil, cost of stock, planting, and cultivation), and 

 1.0p n = amount of $1 compounded annually at 3 per cent for a period 

 equal to the age of the plantation. Total profit or loss per acre 

 equals the amount by which the present value of products per acre 

 exceeds or falls below the total amount of costs to date when com- 

 puted at 3 per cent compound interest. Positive amounts are an 

 excess profit above 3 per cent; negative amounts indicate the sums 

 by which the profit fails to equal 3 per cent. Annual profit or loss 

 per acre equals the total profit or loss per acre divided by the amount 

 of $1 per annum at 3 per cent compound interest for a period equal 

 to age of plantation. 



TABLE 3. Yield and value of cottonwood (Populus deltoides) in Iowa. 



1 In additior to the board feet shown in preceding column. 



2 Cottonwood. 



3 Maple. 



4 Single rows reckoned as 50 feet wide by 871 feet long= 1 acre. 



