Table 2.— Equations (and associated statistics) for predicting site index of a given species from the site index 

 of associated species 



List of List of species (Y) Number^ 



observed whose site index of paired 



species (X) Is predicted observations 



Standard Site index 



deviation range of 



about Coefficient of observed 



Equations regression determination species 



Douglas-fir Engelmann spruce 22(3] 



Grand fir 35(2; 



Lodgepole pine 41(3; 



Ponderosa pine 36(2; 



Subalpine fir 14(2; 



Western larch 50(3; 



Western white pine 24(2; 



Engelnnann spruce Douglas-fir 22(3; 



Grand fir 11(2; 



■ Lodgepole pine 39(2; 



- ' ■ Mountain hemlock 16(2; 



'■ Subalpine fir 36(2; 



Western larch 25(3; 



Western white pine 10(2; 



Grand fir Douglas-fir 35(2; 



Engelmann spruce 11(2; 



Lodgepole pine 14(2; 



■ - Western larch 21(2; 



Western white pine 7(2] 



Lodgepole pine Douglas-fir 41(3; 



Engelmann spruce 39(2; 



Grand fir 14(2; 



Mountain hemlock 15(2; 



Ponderosa pine 9(3] 



Subalpine fir 26(2; 



Western larch 34(3; 



Western white pine 16(2; 



Mountain hemlock Engelmann spruce 16(2) 



Lodgepole pine 15(2) 



Subalpine fir 24(2; 



Western larch 8(2; 



Ponderosa pine Douglas-fir 36(2; 



Lodgepole pine 9(3] 



Subalpine fir Douglas-fir 14(2; 



Engelmann spruce 36(2; 



Lodgepole pine 26(2) 



Mountain hemlock 24(2) 



Western larch 14(2) 



Western white pine 7(2] 



Western larch Douglas-fir 50(3; 



Engelmann spruce 25(3] 



Grand fir 21(2; 



Lodgepole pine 34(3; 



Mountain hemlock 8(2; 



Subalpine fir 14(2; 



Western white pine 27(2; 



Western white pine Douglas-fir 24(2; 



Engelmann spruce 10(2; 



Grand fir 7(2] 



Lodgepole pine 16(2; 



Subalpine fir 7(2] 



Western larch 27(2; 







Feet 



R2 



Feet 



Y = 



9.56 + 0.98X 



6.62 



0.67 



39 76 



Y = 



-14.53 1.01 X 



10.29 



.56 



58-94 



Y = 



25.00 + 0.56X 



4.15 



.65 



39-86 



Y = 



32.66 -h0.59X 



7.60 



.33 



50-89 



Y = 



7.78 + 0.96X 



5.09 



.84 



39-78 



Y = 



26.06 -^0.62X 



3.49 



.81 



41-97 



Y = 



5.01 +0.88X 



7.46 



.76 



38-97 



Y = 



14.05 -F0.69X 



5.54 



.67 



41-89 



Y = 



0.23 + 0.70X 



9.28 



.34 



62-85 



Y = 



1 7.63 -f 0.61 X 



4.86 



.76 



37-89 



Y = 



6.32-f-0.72X 



7.93 



.53 



39-81 



Y = 



2.51 +0.93X 



6.44 



.78 



38-84 



Y = 



32.70 -^0.44X 



5.21 



.46 



48-84 



Y = 



22.07 + 0.54X 



7.70 



.56 



41-90 



Y = 



40.73 + 0.56X 



7.66 



.56 



41-87 



Y = 



46.73 + 0.48X 



7.67 



.34 



33-70 



Y = 



43.69 + 0.38X 



7.97 



.33 



41-84 



Y = 



45.77 -F0.42X 



5.66 



.51 



39-84 



Y = 



10.39 + 0.99X 



8.90 



.34 



55-71 



Y = 



- 7.24-F1.16X 



5.99 



.65 



44-77 



Y = 



- 6.09 + 1.24X 



6.91 



.76 



37-76 



Y = 



1.29-H0.88X 



12.14 



.33 



56-86 



Y = 



- 6.10 + 0.98X 



4.31 



.77 



37-59 



Y = 



17. 45 + 0. SIX 



4.23 



.34 



53-67 



Y = 



-18.72+ 1.42X 



7.56 



.78 



37-77 



Y = 



-12.13+ 1.28X 



4.76 



.74 



48-76 



Y = 



-42.43+ 1.81X 



8.46 



.69 



44-68 



Y = 



21.06 + 0.75X 



8.11 



.53 



25-66 



Y = 



15.92 + 0.78X 



3.85 



.77 



26-54 



Y = 



8.88 + 0.93X 



5.66 



.73 



26-66 



Y = 



15.20 + 0.89X 



7.74 



.42 



36-56 



Y = 



27.62 + 0.56X 



7.45 



.33 



53-91 



Y = 



31.77 + 0.42X 



3.06 



.34 



58-72 



Y = 



2.92 + 0.88X 



4.89 



.84 



49-88 



Y = 



11.54 + 0.84X 



6.13 



.78 



36-87 



Y = 



21.84 + 0.55X 



4.72 



.78 



34-88 



Y = 



4.53 + 0.78X 



5.20 



.73 



28-75 



Y = 



22.88 + 0.63X 



6.27 



.64 



45-88 



Y = 



11.51 +0.78X 



9.20 



.59 



49-82 



Y = 



-21.07+ 1.31X 



5.09 



.81 



47-87 



Y = 



3.73+ 1.05X 



8.04 



.46 



42-75 



Y = 



-27.20 + 1.21X 



9.58 



.51 



58-89 



Y = 



22.64 + 0.58X 



3.18 



.74 



42-82 



Y = 



20.47 + 0.47X 



5.64 



.42 



42-69 



Y = 



1.55 + 1.01X 



7.92 



.64 



42-85 



Y = 



-15.09+ 1.19X 



7.12 



.74 



47-86 



Y = 



12.12 + 0.86X 



7.38 



.76 



38-95 



Y = 



8.85 + 1.03X 



10.62 



.56 



41-77 



Y = 



40.34 + 0.34X 



5.24 



.34 



56-84 



Y = 



34.26 + 0.38X 



3.87 



.69 



40-91 



Y = 



18.72 + 0.76X 



9.02 



.59 



41-81 



Y = 



27.28 + 0.62X 



5.16 



.74 



38-97 



Minimum number of trees of both species per stand in parenttieses. 



3 



