MANAGEMENT PLANS THE NATIONAL FORESTS 43 



SILVICULTURAL POLICY 



OBJECTIVES 



1. To produce saw timl)t>r suitable for tlie fieiierni market. 



'2. To remove the mature and deeadent timber in as short a time as possible 

 aud at the same time to provide for a second cut of sutficieut size to make a 

 profitable oi>eraiion. 



3. To leave the area in the best condition for ultimately putting the forest 

 on a sustained yield basis. 



ROTATION 



A rotation of 100 years has been accepted as the basis for manaRement until 

 such time as yield siudies can \>e made to determine the proper rotation. A 

 growth study made on cut-over lands indicates that the established reproduction 

 will reach saw-timber size within this period. 



CUTTING CVCI.es 



There will be two cuttinc cycles of 50 years each. For tlie first cutting cycle 

 this will provide for an average cut, both Goveniment and private, of about 

 23,000 board feet per acre. For the second cutting cycle the cut on Govenmient 

 land will be reduced to about 1G,000 board feet per acre. The yield from private 

 lands will be small during the second cutting cycle because of the fact that no 

 provision can be made for a second cut. 



MABKINO 



On Site II use the group selection and selection systems. The following rules 

 are effective: 



1. Leave all thrifty trees and the most promising of the thrifty-mature trees; that Is, 

 those which from appearances will coiitiiiue to yrow until the next cutting cycle. 



2. M:\vk all matuiP nnil (iccailent trees. 



3. Mark all dead, dlsoa.sed, and green insect-infosted trees. 



4. Mart: unusually tall trees and trees with very large crowns in situations exposed to 

 severe winds. 



5. Mark all trees which seriously interfere with the accepted logging plan. 

 C. The maximum opening should not exceed 2 acres. 



7. Where possible, leave relatively large thrifty-mature sugar pine for quality Increment. 



On Site III leave only thrifty trees, except when these are insuliii.-ient for 

 seeding purjKJses. Tiie result wiU approach clear cutting with seed trees. 



BESULTS OBTAINED ON PKESENT SAI.E 



On the l,.'i0.j acres of Government land cut over to date, the application of the 

 above marking rules has resulted as follows : 



Per cent 



Average cut per acre, 26,570 board feet 84. 3 



Average left per acre, 4,'.t40 board feet 10. 7 



Future marking jiractico will follow the above rule.*, but in order to insure 

 a satisfactory si-cond cut will iiiin at leaving more of the tlirifty mature trees. 

 The result will be to cut about !S0 in-r cent of the board-feet volume of the 

 timber and to leave about 20 iier cent. For the Government area the totals 

 will be as follows : 



Per cent 



Average cut per acre, 24,000 board feet 80 



Average left per acre, 6,150 board feet 20 



MANAGEMENT POLICY 



<Hl.JErTIVE.S 



1. As is indicnti'i! in the imlicy stat<nu'!it for this area, this working circle 

 is to be ni!Ui;ig»'(i in supply a sinu'If ninniif idnring plant. 



2. Alicnatrd cut ()V( r land available for exib:ince is to be ac(inlred. 



