Table 1. Growth and development results and economic returns for red pine stands with site indexes 55, 65 and 75 planted at 10 x 10 ft spacing (436 trees/acres), thinned at age 30 and 50 and harvested at age 80.

Site Index 55
Stand Age (yrs)
Treatment
Stand Height (ft)
Average DBH (in)
Stems/ac
Stand Basal Area (sq ft/ac)
Cubic ft/ac
Cords/ac
Thousand Board Feet (MBF)
Harvest Value ($)
Timber Value % Change
Net present Value ($)
Soil Expectation Value ($)
0                        
5                        
10                        
15                        
20   21.99 5.90 436.00 82.78 743.48 7.14 0.04 147.46   -280.63 -315.67
25   28.13 6.92 433.12 113.02 1171.23 13.02 1.04 370.33 21.64 -189.60 -160.00
30 Commercial thin 34.04 7.72 430.82 140.22 1810.27 21.14 3.64 806.55 13.97 -63.88 14.13
35   39.66 8.49 270.70 106.39 1527.15 18.26 4.34 1374.35 10.73 48.84 146.51
40   44.95 9.48 269.43 132.04 2214.99 27.02 8.32 2088.55 7.61 146.36 247.72
50 Commercial thin 54.50 10.91 267.49 173.71 3670.78 45.44 16.62 3654.54 4.67 241.72 320.43
60   62.70 13.34 156.05 151.53 3594.46 44.98 18.33 5815.02 4.19 291.17 346.85
70   69.67 14.64 155.34 181.54 4909.25 61.62 25.81 8368.59 3.41 283.18 319.01
80 Final harvest 75.54 15.55 154.80 204.09 6082.17 76.46 32.45 11485.11 3.10 249.01 271.14
90                        
100                        
Site Index 65
Stand Age (yrs)
Treatment
Stand Height (ft)
Average DBH (in)
Stems/ac
Stand Basal Area (sq ft/ac)
Cubic ft/ac
Cords/ac
Thousand Board Feet (MBF)
Harvest Value ($)
Timber Value % Change
Net present Value ($)
Soil Expectation Value ($)
0                        
5                        
10                        
15                        
20   25.99 5.90 436.00 82.78 878.66 8.43 0.05 174.27   -268.40 -293.16
25   33.24 6.92 433.12 113.02 1378.65 15.33 1.23 435.91 21.64 -165.00 -120.63
30 Commercial thin 40.23 7.72 430.82 140.22 2130.85 24.88 4.29 949.38 13.97 -19.85 77.80
35   46.87 8.49 270.70 106.39 1797.59 21.50 5.11 1617.74 10.73 110.52 229.12
40   53.12 9.48 269.43 132.04 2607.24 31.80 9.79 2458.41 7.61 223.40 345.03
50 Commercial thin 64.41 10.91 267.49 173.71 4320.84 53.49 19.57 4301.72 4.67 332.79 426.41
60   74.11 13.34 156.05 151.53 4231.01 52.95 21.58 6844.80 4.19 389.06 455.02
70   82.34 14.64 155.34 181.54 5778.63 72.53 30.38 9850.58 3.41 378.36 420.72
80 Final harvest 89.27 15.55 154.80 204.09 7159.26 90.00 38.19 13519.00 3.10 337.25 363.38
90                        
100                        
Site Index 75
Stand Age (yrs)
Treatment
Stand Height (ft)
Average DBH (in)
Stems/ac
Stand Basal Area (sq ft/ac)
Cubic ft/ac
Cords/ac
Thousand Board Feet (MBF)
Harvest Value ($)
Timber Value % Change
Net present Value ($)
Soil Expectation Value ($)
0                        
15                        
20   29.98 5.90 436.00 82.78 1013.84 9.73 0.06 201.08   -256.16 -270.65
25   38.36 6.92 433.12 113.02 1585.29 17.62 1.41 501.25 21.64 -140.49 -81.41
30 Commercial thin 46.42 7.72 430.82 140.22 2450.25 28.61 4.93 1091.68 13.97 24.03 141.23
35   54.08 8.49 270.70 106.39 2067.03 24.72 5.87 1860.22 10.73 171.97 311.43
40   61.29 9.48 269.43 132.04 2998.04 36.57 11.26 2826.91 7.61 300.15 441.97
50 Commercial thin 74.32 10.91 267.49 173.71 4968.49 61.50 22.50 4946.50 4.67 423.52 531.99
60   85.51 13.34 156.05 151.53 4865.19 60.88 24.82 7870.77 4.19 486.59 562.80
70   95.01 14.64 155.34 181.54 6644.78 83.40 34.94 11327.08 3.41 473.18 522.04
80 Final harvest 103.01 15.55 154.80 204.09 8232.36 103.48 43.92 15545.36 3.10 425.16 455.28
90                        
100