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Title 190-Forestry Inventory Methods Technical Note <br />=i Example Tally Sheet With Three Plots <br />Notes on fi II ing out cruise sheet <br />Keep the same basal area factor [BAF] and fixed plot size <br />for all plats in a stand. <br />In species column, record "in"tree s as they occurwhile <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 indude up to <br />10 tre es. <br />Basal area "in"trees are 10'and greaterDiameterBreastHeight <br />[DBH] collected in 2" diameter dasses. <br />Trees 8" and smaller are recorde d in ne ste d f ixe d pi of as <br />regeneration [ R];a 1/1Mh ac plot measures 118' <br />and a 1/30Dth ac plot measures 6.8' <br />Rege ne rati on can be recorde d by actual diameter or i n <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 10yrs. <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: Producer/Stand 1 BAF: 10 <br />Date: Fixed Plot Size: 1/100thac <br />Cruiser: NRCSPIanner Field Office: <br />GRTH/ <br />WvPt Plot SPECIES DBH AGE 20ths HT CR % <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 />