ESTIMATING THE TREES IN THE WOODLOT 187 



smallest diameters is taken. The corresponding basal areas 

 in square feet are found from the basal area table. The total 

 height of each tree is found by the use of a hypsometer or 

 by one of the other methods described in a previous chapter. 

 The data obtained for the different trees can be recorded 

 in a table as follows : 



Diameter of tree at 

 breast-height in in- 

 ches and tenths. 



Total height of 

 tree in feet. 



Basal area in square 

 feet from basal area 

 table. 



Number of cu- 

 bic feet in 

 tree. 



A different form can be made out for each species of tree 

 if it is desired to keep the species separate or another column 

 can be added to indicate this. The total cubic feet in all the 

 triees added together and this result divided by 90 will give 

 the estimate for the woodlot. 



ESTIMATING A LARGE WOODLOT FOR CORDWOOD 



In a large woodlot instead of estimating each tree in the 

 woodlot, which would be a very long operation, sample acre 

 plots as described for estimating for board feet can be laid 

 off in the woodlot and the average number of cords per acre 

 on the woodlot obtained. This multiplied by the number of 

 acres in the woodlot will give the estimate for the entire tract. 

 Square sample acre plots or circular plots can be laid off in the 

 woodlot located in timber that will be an average of the timber 

 in the woodlot, and each plot estimated by itself and the aver- 

 age for the woodlot obtained. 



Volume tables can also be used in estimating a large wood- 

 lot for cordwood. Knowing the diameters and heights of 

 trees the contents can be found from prepared volume tables. 

 These give the contents of trees in cubic feet and sometimes 

 in cords of wood. 



