APPENDIX A: EQUATIONS OF ESTIMATING BIOMASS 



The regression equations in this appendix and in appendix B were derived from 

 data obtained by Miller, Budy, and Meeuwig (manuscript in preparation) . These equations 

 are based on 68 pinyon and 30 juniper trees on 13 sites throughout Nevada and 3 sites 

 in eastern California. Biomasses are expressed in kilograms ovendry basis. 



Symbols 





= Ln 



[total aboveground biomass] 





Y 2 



= Ln 



[wood (bark excluded) larger than 76 mm 



diameter 



Y 3 



= Ln 



[foliage] 





Xi 



= Ln 



[diameter outside bark at stump height 



(cm)] 



x 2 



= Ln 



[total height (dm)] 





x 3 



= Ln 



[maximum crown diameter (dm) ] 





x 4 



= Ln 



[average crown diameter (dm) ] 





x 5 



= Ln 



[foliage class (defined in appendix D] 





SDR 



= Standard deviation from regression 





Pinyon 



Yi = 



2 



416X X 



+ 0.463X 2 



+ 1 



776X 3 - 



0. 



243X^3 - 



8.429 



R 2 = 







988 



SDR = 0. 



148 











Y 2 = 



3. 



167Xx 



+ 2.827X 2 



- 



408X^2 



+ 



0. 120X^3 



- 14.141 



R 2 = 







991 



SDR = 



163 











Y 3 = 







486X X 



+ 0.470X 2 



+ 1 



287X 4 + 







396X 5 - 5 



504 



R 2 = 







936 



SDR = 



267 











Juniyev 



Yi = 







850X! + 



0.642X 2 + 1 



392X4 



R 2 = 







969 



SDR = 0.199 





Y 2 = 



1 



366X 2 + 



0.336X 1 Xi + - 



6.289 



R 2 = 



0. 



957 



SDR = 0.279 





Y 3 = 







137X!X 2 



+ 1.278X4 - 



3.053 



R 2 = 







919 



SDR = 0.258 





12 



