both cases. The second set of cards (beginning 

 with card or card type 6 in the classification 

 given earher) contains the cost and income 

 data for the present crop. In this problem it 

 is assumed that all development is accom- 

 plished, so only the product evaluation option 

 is utilized in the second card set. Note that in 

 this problem the future timber growing oppor- 

 tunity is evaluated as a perpetual series, where- 

 as the present stand conversion opportunity 

 is terminated. 



Problem 5. In this problem (stand replace- 

 ment) two areas are compared to see which 

 offers the best stand conversion and timber 

 growing opportunity. One is a relatively poor 

 piece of land supporting a stand that contains 

 7,400 cubic feet of usable wood. The other is 

 an area of good land supporting a highly de- 

 fective overmature stand of less usable volume. 



Problem 6, This problem looks into a TSI- 

 program. In this problem even if the manager 

 does nothing in the way of cultural work he 

 expects a certain result. He could thin, but he 

 needs to know what the result would be in 

 terms of return on the thinning investment. 

 Or, he could thin and prune. Under alternative 

 or plan 1, thinning is compared with no cul- 

 tural work. Under alternative or plan 2, a 

 program of thinning and pruning is compared 

 with a program involving no cultural work. 

 Again, two card sets are required, one for each 



set of management assumptions being com- 

 pared under the two alternatives or plans. 



Problem 7. This problem is a comparison 

 of four timber growing alternatives on a pro- 

 posed sale area made in conjunction with 

 silvicultural planning for the area. The pro- 

 posed sale is on a good site capable of produc- 

 ing a harvest yield of 35,000 board feet per 

 acre in 55 years or 70,000 board feet in 85 

 years with stocking control. Comparisons are 

 made using both 55- and 85-year rotations. 



Plan 1. Leave one seed tree group averaging 

 one-fourth acre in size and containing 10 

 Mbf for every 5 acres cut. Seed tree losses in 

 slash disposal and site preparation are ex- 

 pected to be 20 percent. The per-acre cost 

 of added work required to protect seed 

 trees in slash disposal and site preparation 

 is estimated to be SI 0.00. 



Plan 2. Clearcut and plant following slash 

 disposal, with planting expected to be nec- 

 essary on half the area. 



Plan 3. Clearcut with natural regeneration. 

 This plan assumes a good seed year prior 

 to cutting. 



Plan 4. Clearcut and seed, with seeding ex- 

 pected to be necessary on half the area. 



The costs used in this problem are shown in 

 table 5. The yields expected are shown in 

 table 6. 



Table 5. — Average costs per acre for the problem area as a whole 

 according to activity and plan 



Activity 



Plan 1 



Plan 2 



Plan 3 



Plan 4 



Site preparation 



Value of seed trees 



Cost of seed tree salvage sale 



Cost of seed tree sale 



Planting 



Seeding 



Thinning 



Stage 2 surveys 



10.00 

 20.00 

 .40 

 4.00 



25.00 

 .50 



Dollars 



19.00 



15.00 

 .50 



25.00 

 .50 



9.00 

 22.00 

 .50 



34 



