MANAGEMENT OF YELLOW PINE. 5] 
entirely in mature timber. The damage from lightning was also 
considerable. 
TABLE 28.—Results of cutting on Greenlaw Lumber Co. sale, Coconino National 







Forest, 
amie A Average | Percent 
: Number | Average | amount | of origi- 
Location. of acres. cut. left | nal stand 
|standing. left. 
| 
Ft.b.m.| Ft.b.m. 
7 EE TNS TRY DRESS) Be ne a re 396 3,350 1, 294 27.9 
emp row ee SC CH Oceana ee norma an aioe Son ose cosine neous 229 3, 590 1, 330 DA sAL 
2. El Whos Io ibe ses Wa eae ae ee ae ee ee 238 3, 246 1,060 24.6 
TE Zl Beg DRS) SS SSO See a a ee 310 2, 228 1,339 37.5 
2, EE INTE TRIS TDs 100002) nee 211 2,105 1, 240 37.1 
TD, SE I Nleg Ua v BS SOS GIs ne eee a er aan 160 3, 125 1, 521 32.8 
Meee BN ep Seb SCC ro eames sees Soe bok Bases atcoe Ss ee eee 195 3, 069 1,020 24.9 
TD. BB IN IRS leh SCS CPs a ns ee ae 622 3, 550 1,349 2 
, BO ISI URS IBV 0 BEL a eee ee ee a neers 434 5, 645 1, 422 20.1 
BE, INL TRAYS ID ov se PNE e a  a aea 590 | = 5,302 1, 493 21.9 
BB lag Tata ie Bigg SCs GI th see ia ate encarta epg eve 610 2, 571 1,152 30.9 
> BE) Nee Re bey ROY Oe eee eee ea ae ee ee ee 60 2,760 1, 418 33.9 
TD Du ING IRS aa SECS 2 Sgoceso Sansa eee see ee eee 126 2,998 1,579 34.5 
BB IN TS) lige SOC 7 es oe Seana eee es aoe ieee 370 2, 886 1 500 34. 2 
Bee ZBNG i Cetin SCCa Lone eens mine ha eee Sesseceosuce eee 310 5, 376 1,898 26.0 
5 BB IN egelite Sie GOGs CALI DS aes i Ser ee 275 3, 489 1,449 29.3 
TP; ED Wiog RASS) Liss SEOs Be cons anaes eae eee ee ere 7 1,876 1, 556 45.3 
. BIL INlby Lets DAS OSs ee ee see ee ge ee 160 3, 955 Wey 25.9 
INSTRU S, SC BAS a le pls 2 5 Aaa RS Sn |b pee 8 a | 3,395 | 1,388 | o0s0 

Cutting on private land in the Southwest is usually in decided 
contrast to that on the National Forests. On all private land within 
the Tusayan National Forest logged north of Challender the average 
stand left per acre amounted to but 699 board feet. About 300 feet, 
board measure, of merchantable timber was left on the ground 
through wasteful logging. 
ROTATION OF CUT. 
The best rotation for western yellow pine can not be predicted with 
certainty until regulated cutting has been more thoroughly tried out. 
Tentatively, a rotation of 200 years is recommended. The average 
_ mature blackjack is from 125 to 150 years old. Ordinarily the 
overmature yellow pine which is now being lumbered is from 300 
to 400 years old. All available figures indicate that it will take 200 
years to grow saw timber. It will be seen from the preceding tables 
that diameter growth begins to fall off at from 100 to 160 years, and 
that height growth declines from the mean annual after 170 years. 
In Table 10 a yellow pine 200 years old averages only 20.60 inches in 
diameter, and in Table 11, 21.3 inches. This is certainly the mini- 
mum size that can be estimated to yield timber of fair quality that 
will justify shipment. With thrifty, well-thinned stands, however, 
it is hoped the growth will be greater. 
In some localities approximately 1 per cent of the total growing 
stock is believed to be a safe annual cut. This figure will, of course, 


