SUGAK PINE. 



29 



Table 20 shows maximiun stands of sugar pine within the sugar 

 pine-yeilow pine type in tliree representative Sierra Nevada range 

 locahties, as well as the proportion of other species in mixture. 



The heaviest single acre estimate of which the Forest Service has 

 a record is 192,000 feet b. m., which amounted to 75 per cent of the 

 total estimate for the acre plot. Acres containing 75,000 to 150,000 

 feet b. m. are frequently found within the maximum range of the 

 species. The largest single tree measured by the Forest Service 

 scaled 40,710 feet b. m. 



Table 21. — Yellow pine type (quality II). Yield per acre and increment per aa'e per 



annum of all species. 







Incre- 







Incre- 







Incre- 



Age. 



Yield 



ment per 



Age 



Yield 



ment per 



Age. 



Yield 



ment per 



per acre. 



acre per 





per acre. 



acre per 



per acre. 



acre per 







annum. 







annum. 







annum. 



Year-^. 



Bd.ff. 



Bd.ft. 



Years. 



Bd.ft. 



Bd.ft. 



Yearst 



Bd.ft. 



Bd.ft. 



10 



00 



5.5 



150 



15, 900 



106 



290 



33,200 



114.5 



20 



220 



11 



160 



17,900 



112 



300 



33,300 



111 



30 



550 



18 



170 



19,900 



117 



310 



33,200 



107 



40 



1,000 



25 



180 



21,900 



122 



320 



33,000 



103 



50 



1,600 



• 32 



190 



23,800 



125 



330 



32, 600 



99 



60 



2,600 



43 



200 



25,600 



128 



340 



32,200 



94.5 



70 



3,500 



50 



210 



27, 200 



129.5 



350 



31,700 



90.5 



SO 



4,600 



57 



220 



28,700 



130.5 



360 



31,100 



86.5 



90 



5.900 



(T) 



230 



29,800 



130 



370 



30,500 



82.5 



100 



7,300 



■;3 



240 



30,900 



129 



380 



29,900 



78.5 



110 



8,800 



80 



250 



31,700 



127 



390 



29,200 



75 



120 



10,400 



87 



260 



32,300 



124 



400 



28,500 



71.2 



130 



12,100 



93 



270 



32,800 



121 









140 



14,000 



100 



280 



33,100 



118 









Table 22. — Fir-sugar pine type {quality II). Yield per acre and increment per acre 



per annum of all species. 







Incre- 







Incre- 







Incre- 



Age. 



Yield 



ment per 



Age. 



Yield 



ment per 



Age. 



Yield 



ment per 



per acre. 



acre per 



per acre. 



acre per 



per acre. 



acre per 







annum. 







annum. 







annum. 



Ymts. 



Bd.ft. 



Bd.ft. 



Years. 



Bd.ft. 



Bd.ft. 



Years. 



Bd.ft. 



Bd.ft. 



10 



80 



8 



230 



40, 500 



176 



450 



88, 400 



196. 5 



20 



300 



15 



240 



43, 700 



182 



460 



88, 700 



193 



30 



700 



23 



250 



47,000 



188 



470 



88, 700 



189 



40 



l,.30O 



32 



260 



50, 300 



193.5 



480 



88,500 



184 



50 



2,0fJ0 



40 



270 



53,600 



198.5 



490 



88, 200 



180 



60 



2,900 



48 



280 



57, 000 



203.5 



500 



87,700 



175.5 



70 



3,900 



50 



290 



60, 200 



207.5 



510 



87,000 



170.5 



80 



5,100 



64 



300 



63, 500 



211.5 



520 



86, 200 



165.5 



90 



6,500 



72 



310 



66, 5(X) 



214.5 



530 



85, 200 



161 



100 



8,000 



80 



320 



69,200 



216 



540 



84, 100 



155.5 



110 



9,600 



87.5 



330 



71,8(K) 



217.5 



550 



82, 800 



150. 5 



120 



11,400 



96 



840 



74,200 



218 



560 



81,500 



145. 5 



130 



13,400 



103 



350 



70,3(W) 



218 



570 



80, 100 



MO. 5 



140 



15, .000 



111 



360 



78,.3(K) 



217.5 



580 



78, 7(K) 



135.5 



l.OO 



17, 800 



118.5 



370 



80,1(X) 



216.5 



590 



77, 300 



131 



\m 



20, 2fX) 



126 



380 



81,700 



215 



600 



75,900 



126. 5 



170 



22,600 



133 



300 



83, 2(X) 



21.3.5 



610 



74,.5IK) 



122 



ISO 



2.v,2fJ0 



140 



400 



84, 5(K) 



211.5 



020 



73, 100 



118 



190 



2S,000 



147.5 



410 



85, 700 



209 



630 



71, con 



113 



2fX) 



31, (XX) 



1.55 



420 



86, 6(K) 



2<Xi 



640 



70, 000 



109.5 



210 



34,fXX) 



162 



430 



87, 4(X) 



203 









220 



37, 2fXJ 



169 



440 



88, (XX) 



2(X) 









vSincc sugar pine never occurs in pure or even-aged stands, tlio 

 problem of predicting the acreage yield at various ages is a complex 

 one wliifh has not as yet been satisfa(;torily solved. Tables 21 and 

 22 indicate the probable yield of uU species in the yellow pine and 



