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Title 190-Forestry Inventory Methods Technical Note <br />Figure 6: Example Tally Sheet With Three Plots <br />(votes on tilling out cruise sneer <br />Keep the same basal area factor (BAF) and fixed plot size <br />for all plots in a stand. <br />In species column, record "in" trees as they occur while <br />pivoting in one circular direction. <br />Use the dot grid tally to save space: DF alone is one tree, <br />DF* is two trees, ect. The dot tally can include up to <br />1D tre es. <br />Basal area "in" trees are 10' and greater Diamete r Breast Height <br />(DBH) collected in 2" diameter dasses. <br />Trees 8" and smaller are recorded in nested fixed plot as <br />regeneration ( R);a 1/100th ac plot measures 118' <br />and a 1/300th ac plot measures 6.8' <br />Regeneration can be recorded by actual diameter or in <br />dasses:0-1, 2-3, 4-5, 6-7 and 8-9. <br />A growth tree (GT) is often a plot tree, however when it isn't, <br />record it on its own line. <br />Measure and record growth of the last 1Dyrs. <br />Age istotal age; need to add how many years it took for <br />tree to reach DBH. When in doubt, use 10yrs. <br />Crown ratio (CR) is % of tree with live crown. <br />Record a snag (S) as it occurs in the plot as iftheywere a separate <br />species and you can determine snags per acre. <br />You can make additional notes recording insect or disease, <br />understory, aspect, or slope in unused space on right <br />side of cruise sheet. <br />Property: F'rooucer/Stan11 uhh: 111 <br />Date: Fixed Plot Size: 1/103th ac <br />Cruiser: NRCS Planner <br />Field Office: <br />GRTH/ <br />WyPt Plot SPECIES DBH <br />256 1 DF 10 <br />DF* 12 <br />DF* 16 <br />DF" 14 <br />R LP** 8 <br />WL 6 <br />LP* 6 <br />23/ 2 DF 16 <br />DF 14 <br />WL* 12.4 <br />WL* 10 <br />SNAG 18 <br />R DF** 0-1 <br />AGE 20ths HT CR % <br />W EST ASPECT <br />30% SLOPE <br />OREGON GRAPE, <br />KINN ICKI NICK, <br />PINE GRASS <br />SOME SPRUCE BUOW ORM <br />NOT TOO BAD <br />75 10 62 40 <br />GT DF 16.2 96 12 75 50 <br />258 3 DF 14 <br />LP 10 <br />LP 12 <br />DF 10 <br />DF 12 <br />R DF* 0-1 <br />Note that this is only an example; consult a forester for a tally sheet adjusted to local forest types. <br />• Basic Inventory Calculations <br />o A programmed spreadsheet is useful in making these calculations efficiently and <br />consistently. Check with a local or State forester to see if a spreadsheet is available. <br />o Determining BA <br />- BA. —A measure of how much of an acre is occupied by trees. Each forest type <br />has a BA range that is optimal for individual tree growth. Determining BA is <br />fairly simple: <br />BA = (total trees tallied ± total # of plots) x BAF <br />In the example, only BAs for trees 10 inches DBH and greater are determined. <br />There are 19 trees 10 inches DBH and greater, so: 19-3 x 10 BAF = 63 square feet <br />of BA per acre. <br />o Determining TPA <br />(Technical Note No. 190-FOR-01, Jul 2018) <br />9 <br />