HOME |FEEDBACKWELCOME TO SSSSS TTTTTTTT AAA GGGGG SS SS TTTTTTTT A A GGGGGGG SS TT AA AA GG SSSSS TT AAAAAAA GG GGG SS TT AA AA GG G SS SS TT AA AA GGGGGGG SSSSS TT AA AA GGGGG The STAnd Generator for mixed conifers version 4.4A (c) Copyright 1984-1994 The Regents of The University of California MAIN PROGRAM ------------ Type "pc" to get a list of commands stag:sg >sgdemo.sdg MAKE A HYPOTHETICAL PLOT DESCRIPTION |Enter the stand ---- - ------------ ---- ----------- |generation routine, |automatically over- |writing the file Enter a plot description (20 char max):sg demo plot |"sgdemo.sdg" if it Enter the elevation of this plot: 3500 |exits. Type "pc" to get a list of commands | | |Start generating sg:sg |species with some *** MAKE ALL ENTRIES PER ACRE *** |small white fir. All tree weights = 1, the number of tree records will be | the same as the number of trees specified | | Enter the following information: |White fir, 50 sq.ft. BA, species code.................(1-14) |170 trees/acre, site basal area (>6 inches).......(5-400) |index 88. number of trees(>6 inches)...(5-500) | | Enter here (separated by commas-? for species list): 5,50,150 | Enter the site index of this species: 88 | | Species.................White Fir | Quadratic mean DBH...... 7.8 | Predicted average DBH... 7.6 | Number of trees > 6"....150 | | [RETURN] Generate species, [R]etry, or [A]bort : |Generate species with a Developing weibull distribution ... |carriage return. | Filling in diameters ... | | Total plot basal area... 50. |Total height and crown Total number of trees... 150 |lengths are automatically |estimated. Filling in missing data on: sg demo plot | | |Look at the results in sg:dt |a diameter distribution Print diameter distribution |plot. | Plot label : sg demo plot | All species combined | | dbh trees | 30 60 90 120 | |..............|..............|..............|..............| | 0 - 2 0. | | 2 - 4 0. | | 4 - 6 4. |11 | 6 - 8 28. |11111111111111 | 8 -10 76. |11111111111111111111111111111111111111 | 10-12 41. |111111111111111111111 | 12-14 1. |1 | ------------ | total 150. | | |Save the tree list sg:sv |internally so we can Internally saving current plot information |come back to this |point wihtout starting |over. sg:sg | *** MAKE ALL ENTRIES PER ACRE *** |Now let's add some All tree weights = 1, the number of tree records will be |residual point trees. the same as the number of trees specified | | Enter the following information: |Ponderosa pine, 200 species code.................(1-14) |sq.ft. BA, 100 trees basal area (>6 inches).......(5-400) |per acre, site index 99. number of trees(>6 inches)...(5-350) | | Enter here (separated by commas-? for species list):1,200,100 | Enter the site index of this species: 99 | | Species.................Pond. Pine |Mean DBH is 17.8 Quadratic mean DBH......19.1 |inches. Predicted average DBH...17.8 | Number of trees > 6"....100 | |We don't like the size of [RETURN] Generate species, [R]etry, or [A]bort : r |the trees, they are too small. *** MAKE ALL ENTRIES PER ACRE *** | All tree weights = 1, the number of tree records will be |We try for larger trees by the same as the number of trees specified |decreasing trees/acre. | Enter the following information: | species code.................(1-14) | basal area (>6 inches).......(5-400) | number of trees(>6 inches)...(5-350) | | Enter here (separated by commas-? for species list): 1,200,70 | Enter the site index of this species: 99 | | Species.................Pond. Pine | Quadratic mean DBH......22.9 | Predicted average DBH...21.5 |Avg. DBH is 21.5" Number of trees > 6".... 70 | | [RETURN] Generate species, [R]etry, or [A]bort : r |Acg. DBH still seems *** MAKE ALL ENTRIES PER ACRE *** |too small. All tree weights = 1, the number of tree records will be | the same as the number of trees specified | | Enter the following information: | species code.................(1-14) | basal area (>6 inches).......(5-400) | number of trees(>6 inches)...(5-350) | | Enter here (separated by commas-? for species list): 1,200,40 | Enter the site index of this species: 99 | | Species.................Pond. Pine | Quadratic mean DBH......30.3 | Predicted average DBH...29.1 |Avg. DBH is 29.1". Number of trees > 6".... 40 | | [RETURN] Generate species, [R]etry, or [A]bort : |This is what we think Developing weibull distribution ... |we want. | Filling in diameters ... | | Total plot basal area... 250. | Total number of trees... 190 |Let's look at the |result. Filling in missing data on: sg demo plot | | | sg:dt | Print diameter distribution | | Plot label : sg demo plot | All species combined | | dbh trees | 30 60 90 120 | |..............|..............|..............|..............| | 0 - 2 0. | | 2 - 4 0. | | 4 - 6 4. |11 | 6 - 8 28. |11111111111111 | 8 -10 77. |111111111111111111111111111111111111111 | 10-12 41. |111111111111111111111 | 12-14 1. |1 | 14-16 1. |1 | 16-18 4. |11 | 18-20 1. |1 | 20-22 2. |1 | 22-24 2. |1 | 24-26 3. |11 | 26-28 4. |11 | 28-30 1. |1 | 30-32 4. |11 | 32-34 3. |11 | 34-36 2. |1 | 36-38 6. |111 | 38-40 3. |11 | 40-42 1. |1 | 42-44 0. | | 44-46 1. |1 | 46-48 1. |1 | ------------ | total 190. | | |We decide that this sg:rt |really isn't what we Restoring plot information |wanted, so we go |back to the internally |saved tree list start sg:dt |over. Print diameter distribution | | Plot label : sg demo plot | All species combined | | dbh trees | 30 60 90 120 | |..............|..............|..............|..............| | 0 - 2 0. | | 2 - 4 0. | | 4 - 6 4. |11 | 6 - 8 28. |11111111111111 | 8 -10 76. |11111111111111111111111111111111111111 | 10-12 41. |111111111111111111111 | 12-14 1. |1 | ------------ | total 150. | | |We will put the pine sg:sg |in using a quadratic *** MAKE ALL ENTRIES PER ACRE *** |mean diameter of 22.9" All tree weights = 1, the number of tree records will be |found above. the same as the number of trees specified | | Enter the following information: | species code.................(1-14) | basal area (>6 inches).......(5-400) | number of trees(>6 inches)...(5-350) | | Enter here (separated by commas-? for species list): 1,200,70 | Enter the site index of this species: 99 | | Species.................Pond. Pine | Quadratic mean DBH......22.9 | Predicted average DBH...21.5 | Number of trees > 6".... 70 | | [RETURN] Generate species, [R]etry, or [A]bort : | Developing weibull distribution ... | | Filling in diameters ... | | Total plot basal area... 250. | Total number of trees... 220 | | Filling in missing data on: sg demo plot | | | sg:dt nomore | Print diameter distribution |Look at the results. | Plot label : sg demo plot | All species combined | | dbh trees | 30 60 90 120 | |..............|..............|..............|..............| | 0 - 2 0. | | 2 - 4 0. | | 4 - 6 4. |11 | 6 - 8 29. |111111111111111 | 8 -10 76. |11111111111111111111111111111111111111 | 10-12 44. |1111111111111111111111 | 12-14 5. |111 | 14-16 8. |1111 | 16-18 6. |111 | 18-20 1. |1 | 20-22 11. |111111 | 22-24 9. |11111 | 24-26 7. |1111 | 26-28 5. |111 | 28-30 1. |1 | 30-32 9. |11111 | 32-34 2. |1 | 34-36 3. |11 | ------------ | total 220. | | | sg:pf nomore | Print stand profile |For another |dimension we can Plot label : sg demo plot |also look at the All species combined |stand profile. | feet above ground | DBH Trees | 24 48 72 96 120 144 168 192 216 240 | |.....|.....|.....|.....|.....|.....|.....|.....|.....|.....| | 0 - 2 0. | | 2 - 4 0. | | 4 - 6 4. |====>>>>>> | 6 - 8 29. |=====>>>>>> | 8 -10 76. |======>>>>>>>> | 10-12 44. |=======>>>>>>>>> | 12-14 5. |========>>>>>>>>>> | 14-16 8. |=========>>>>>>>>>>>>> | 16-18 6. |===========>>>>>>>>>>>>> | 18-20 1. |============>>>>>>>>>> | 20-22 11. |=============>>>>>>>>>>>>>> | 22-24 9. |=============>>>>>>>>>>>>>>> | 24-26 7. |===============>>>>>>>>>>>>>> | 26-28 5. |================>>>>>>>>>>>>>>> | 28-30 1. |==================>>>>>>>>>>>>> | 30-32 9. |=================>>>>>>>>>>>>>>>> | 32-34 2. |==================>>>>>>>>>>>>>>>> | 34-36 3. |===================>>>>>>>>>>>>>>>>>> | ------------ | total 220. | | |Before we add an sg:st |understory component, |let's examine a stock STOCK TABLE |table. ----------- | Plot label = sg demo plot | | | species Dq N/ac BA MCF MBF | --------------------------------------------------- | | Pond. Pine 23.25 70. 206.4 7.85 48.16 | White Fir 9.30 150. 70.7 1.65 5.67 | Totals 15.20 220. 277.1 9.49 53.83 | | | sg:ug |Begin the understory Use current stand to predict understory? (y/n):y |generation routine, using |the stand just generated to All tree weights = 1, the number of tree records will be |predict the understory. the same as the number of trees specified (rounded to nearest integer) | | Enter the following information: |STAG automatically minimum diameter class............(1- 5) |determines the current maximum diameter class............(minimum dbh class- 5) |overstory/understory |boundary (5" in this case). Enter here (separated by commas): 1,5 | Developing weibull distribution ... |Predicting the number of |understory trees from over- |story conditions is at best Predicted number of trees in understory .......... 34 |imprecise. Thus, a 95% confidence |interval is offered to guide Approximate 95% prediction interval .......[ 0, 213] |this decision. | Would you like to change this number? (y/n): n | | The default species composition (in percent) for the Mixed conifer | forest type is as follows: | ponderosa pine......10.0 | sugar pine.......... 5.0 | incense cedar.......30.0 | Douglas-fir.........15.0 | white fir...........40.0 | red fir............. .0 | | Enter new percentages (separated by commas) or | Return for default: | | Quadratic mean DBH of overstory (>6")...14.4 | Number of trees in overstory (>6")......220 | Number of trees in understory ( 1- 5").. 34 |The choices we have Understory proportion in PP.............10.0 |made are summarized Understory proportion in SP............. 5.0 |before the understory Understory proportion in IC.............30.0 |trees are actually Understory proportion in DF.............15.0 |generated. Understory proportion in WF.............40.0 | Understory proportion in RF............. .0 | [RETURN] Generate species, [R]etry, or [A]bort : | Filling in diameters ... | | Total plot basal area... 252. |(Recall that we turned Total number of trees... 254 |OFF automatic understory |collapsing with "uc" in Filling in missing data on: sg demo plot |the configuration routine, |therefore it is not performed |upon exting ug). Automatic collapsing of tree records is selected, but | none was necessary. | | | sg:dt nomore | Print diameter distribution | | Plot label : sg demo plot | All species combined | | dbh trees | 30 60 90 120 | |..............|..............|..............|..............| | 0 - 2 12. |111111 | 2 - 4 14. |1111111 | 4 - 6 12. |111111 | 6 - 8 29. |111111111111111 | 8 -10 76. |11111111111111111111111111111111111111 | 10-12 44. |1111111111111111111111 | 12-14 5. |111 | 14-16 8. |1111 | 16-18 6. |111 | 18-20 1. |1 | 20-22 11. |111111 | 22-24 9. |11111 | 24-26 7. |1111 | 26-28 5. |111 | 28-30 1. |1 | 30-32 9. |11111 | 32-34 2. |1 |We've decided that we 34-36 3. |11 |don't need so much detail ------------ |on the stand below 11" total 254. |DBH. Invoke the collapse |understory routine. | sg:cu | Please enter an integer DBH below which | tree records will be collapsed: 22 | | Combining (collapsing) similar understory tree records ... |Collapsing is still |governed by ratio set with |"ur" in "cf". After collapsing tree records: | |A semmary of the collapsing Basal area (>6")........... 277. |algorithm results is printed. Basal area (all trees)..... 279. | Number of trees (>6")...... 220 | Number of trees (total).... 254 | Number of tree records..... 93 | | | sg:dp r=3 nomore |Let's display a few |records to examine how Display tree records |the tree expansion factors plot label : sg demo plot |have changed from the |original 1 tree/ac. no. sp dbh ht cr exp | ---------------------------------- | 1 PP 30.5 141. .567 1.000 | 4 PP 22.0 110. .486 1.000 | 7 PP 22.6 105. .501 1.000 | 10 PP 23.5 107. .430 1.000 | 13 PP 23.7 120. .612 1.000 | 16 PP 31.9 131. .521 1.000 | 19 PP 22.1 102. .426 1.000 | 22 PP 22.9 121. .543 1.000 | 25 PP 24.5 123. .551 1.000 | 28 PP 24.5 114. .565 1.000 | 31 PP 27.5 115. .464 1.000 | 34 PP 27.1 132. .563 1.000 | 37 PP 1.5 12. .802 2.000 | 40 PP 6.7 46. .663 1.000 | 43 PP 12.5 80. .560 4.000 | 46 PP 14.3 77. .458 2.000 | 49 PP 17.6 83. .411 1.000 | 52 PP 17.6 98. .625 1.000 | 55 PP 21.8 104. .468 3.000 | 58 PP 20.9 116. .590 2.000 | 61 IC 1.9 10. .518 4.000 | 64 IC 3.8 18. .445 1.000 | 67 DF 1.7 19. .718 1.000 | 70 DF 3.9 30. .581 1.000 | 73 WF 3.0 20. .675 1.000 | 76 WF 3.2 19. .580 1.000 | 79 WF 6.5 35. .390 2.000 | 82 WF 6.7 49. .774 3.000 | 85 WF 8.8 59. .513 13.000 | 88 WF 10.0 58. .635 15.000 | 91 WF 11.6 64. .470 2.000 | | | sg:st | | STOCK TABLE |Print a stock table to ----------- |see the impact of Plot label = sg demo plot |adding the understory. | | species Dq N/ac BA MCF MBF | --------------------------------------------------- | | Pond. Pine 22.62 74. 206.6 7.79 47.60 | Sugar Pine 3.97 3. .3 .00 .00 | Cedar misc 2.76 10. .4 .00 .00 | DouglasFir 3.02 4. .2 .00 .00 | White Fir 8.95 163. 71.2 1.65 6.00 | Totals 14.18 254. 278.7 9.45 53.60 | | | sg:ex |We're satisfied with Saving tree list for plot : sg demo plot |results, exit and save |stand description. | stag:sg >sgdemo.sdq | MAKE A HYPOTHETICAL PLOT DESCRIPTION |Let's go back to the ---- - ------------ ---- ----------- |stand generation |routine. | Enter a plot description (20 char max): dq demo plot | Enter the elevation of this plot: 3500 | Type "pc" to get a list of commands | | | | |Let's generate trees sg:dq |using the negative *** MAKE ALL ENTRIES PER ACRE *** |exponential distribution. All tree weights = 1, the number of tree records will be | the same as the number of trees specified (rounded to nearest integer) | |Note that this distribution Enter the following information: |can be used for modelling species code.................(1-14) |both over- and under-story minimum diameter class.......(1-99) |components. maximum diameter class.......(minimum diameter class-99) | diameter class increment.....(integer) | | Enter here (separated by commas-? for species list): 1,2,24,2 | Enter the site index of this species: 88 |We created a DBH distribution Do you know q? (y/n): y |for ponderosa pine with 1.5 Enter Q: 1.5 |for the diminution quotient (Q). Do you know the number of trees in the largest diameter class? (y/n): y | Enter the number of trees per acre in the largest diameter class: 1.2 | | Species.................................Pond. Pine | Q.......................................1.500 | Total basal area........................ 90. | Minimum diameter class.................. 2 | Maximum diameter class.................. 24 | Diameter increment...................... 2 | Number of trees in max. diameter class.. 1.20 | | [RETURN] Generate species, [R]etry, or [A]bort : | Developing negative exponential distribution ... | | Filling in diameters ... | | Total plot basal area... 90. | Total number of trees... 308 | | Filling in missing data on: dq demo plot | | | sg:dt | Print diameter distribution |Examine the results by |printing the DBH Plot label : dq demo plot |distribution and by All species combined |printing the stand |profile. dbh trees | 30 60 90 120 | |..............|..............|..............|..............| | 0 - 2 63. |11111111111111111111111111111111 | 2 - 4 88. |11111111111111111111111111111111111111111111 | 4 - 6 52. |11111111111111111111111111 | 6 - 8 32. |1111111111111111 | 8 -10 26. |1111111111111 | 10-12 15. |11111111 | 12-14 10. |11111 | 14-16 10. |11111 | 16-18 4. |11 | 18-20 4. |11 | 20-22 4. |11 | 22-24 0. | | ------------ | total 308. | | | sg:pf | Print stand profile | | Plot label : dq demo plot | All species combined | | feet above ground | DBH Trees | 24 48 72 96 120 144 168 192 216 240 | |.....|.....|.....|.....|.....|.....|.....|.....|.....|.....| | 0 - 2 63. |>>> | 2 - 4 88. |==>>> | 4 - 6 52. |===>>>>> | 6 - 8 32. |=====>>>>> | 8 -10 26. |=======>>>>>> | 10-12 15. |========>>>>>>> | 12-14 10. |==========>>>>>>> | 14-16 10. |==========>>>>>>>> | 16-18 4. |===========>>>>>>>>>> | 18-20 4. |=============>>>>>>>>> | 20-22 4. |=============>>>>>>>>>> | 22-24 0. | | ------------ | total 308. | | | sg:ex | Saving tree list for plot : dq demo plot |Exit and save stand |description. | stag:ex | stag: user termination | | Appendix B.4. Stand Generation