than 7.6 cm. Conventional cordwood harvesting of these 

 species leaves approximately 50 percent of the biomass 

 of even the larger trees. If the resources are to be 

 utilized to their fullest and not create greater management 

 problems, the application of total tree harvesting appears 

 advantageous. 



The equations and weight tables presented in this report 

 are on an ovendry basis. The green weight of the total tree 



or the various size fractions can be estimated using the 

 moisture contents given in table 4. Moisture content was 

 calculated on a green-weight basis; thus, to obtain a green 

 weight simply divide the ovendry weight by 1 minus the 

 moisture content expressed as a decimal. 



Green weight = 



Ovendry weight 

 1 - moisture content 



Table 1 —The tree variable means and the average biomass for each diameter class 



Tree variables (x) 



Diameter Sample Crown Average biomass 



Species 



class 



trees 



Height 



d.r.c. 



d.s.h. 



d.b.h. 



Max 



Min 



Average Forks 



Age 



Green 



Dry 





cm 



No. 



m 





-cm-- 







m 





- No. 



Yr 



kg- 





Pinyon 



<10 



4 



2.0 



6.0 



4.9 



2.1 



1.4 



1.0 



1.2 







56 



4.3 



2.3 





10-20 



19 



4.2 



15.9 



14.6 



9.8 



2.7 



2.2 



2.5 







79 



66.8 



35.1 





20-30 



17 



6.1 



24.7 



23.5 



19.0 



4.4 



3.6 



4.0 



2 



97 



247.1 



135.5 





30-40 



17 



7.1 



36.3 



34.5 



28.7 



5.6 



4.4 



5.0 



12 



126 



583.0 



333.4 





>40 



19 



9.0 



55.2 



53.1 



47.5 



8.0 



6.3 



7.2 



35 



164 



1627.2 



966.0 



Juniper 



10-20 



7 



4.2 



17.2 



15.3 



8.3 



2.9 



2.1 



2.5 







91 



52.9 



28.4 





20-30 



8 



5.1 



25.9 



22.3 



14.3 



3.7 



3.1 



3.4 



1 



98 



135.1 



73.4 





30-40 



7 



5.0 



34.0 



28.8 



16.9 



4.5 



3.6 



4.1 



4 



124 



226.9 



121.3 





>40 



11 



6.7 



58.2 



48.3 



32.2 



6.7 



5.4 



6.1 



13 



147 



666.3 



368.7 



Table 2— The distribution of aboveground biomass (dry weight) in size fractions 



Diameter Sample Average Size fractions (cm) 



Species 



class 



trees 



biomass 



>7.6 



2.5 to 7.6 



0.64 to 2.5 



<0.64 



Foliage 



Deadwood 





cm 



No. 



Kg 







Percent 



















Pinyon 



<10 



4 



2.3 







23 



26 



16 



29 



5 





10-20 



19 



35.1 



28 



15 



11 



13 



27 



6 





20-30 



17 



135.5 



34 



18 



10 



12 



19 



7 





30-40 



17 



333.4 



42 



17 



8 



8 



14 



11 





>40 



19 



966.0 



52 



13 



6 



6 



11 



12 



Juniper 



10-20 



7 



28.4 



24 



15 



11 



8 



40 



2 





20-30 



8 



73.4 



28 



18 



10 



8 



33 



3 





30-40 



7 



121.3 



23 



23 



12 



6 



30 



6 





>40 



11 



368.7 



36 



19 



9 



5 



24 



7 





Table 3— The distribution of abovegrou 



nd biomass (dry weight) in tree components 



Species 



Diameter 



Sample 



Average 





Tree component proportions 





class 



trees 



biomass 



Wood 



Bark 



Deadwood 1 



Foliage 



Pinyon 



cm 



No. 



kg 







Percent 





<10 



4 



2.3 



47 



18 



5 



29 





10-20 



19 



35.1 



51 



16 



6 



27 





20-30 



17 



135.5 



57 



17 



7 



19 





30-40 



17 



333.4 



58 



17 



11 



14 





>40 



19 



966.0 



62 



15 



12 



11 



Juniper 



10-20 



7 



28.4 



48 



10 



2 



40 





20-30 



8 



73.4 



53 



11 



3 



33 





30-40 



7 



121.3 



53 



11 



6 



30 





>40 



11 



368.7 



59 



10 



7 



24 



'Deadwood component not separated into wood and bark fractions. 



4 



