Homework Assignment #6-Calculating Stand Attributes from Variable Radius Sampling

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Western Carolina University *

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210

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Biology

Date

Jan 9, 2024

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docx

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1

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NRM-240 Natural Resources Measurements Homework #6–Calculating density and basal area using variable radius plots For each of your group’s plots, make sure to either record all the data from Variable Radius Sampling Lab or copy or photograph the data sheet. Enter data into Excel and follow the templates below to complete the assignment. Upload your calculations in a spreadsheet in the link on Canvas Part A) For each plot, calculate the basal area ft 2 per acre of trees by multiplying the number of “in” trees by the BAF (Basal Area Factor). This is the number of BA ft 2 /acre for all trees. Use the table below to help you organize the data for Part B. Plot 1 Tree species # of “in” trees BA ft 2 /acre (“in” trees X BAF (10) oak 4 40 Sourwood 2 20 Scarlet oak 3 30 White pine 1 10 Total BA ft 2 /acre 110 Plot 2 Tree species # of “in” trees BA ft 2 /acre (“in” trees X BAF (10) Oak 4 40 White pine 3 30 Total BA ft 2 /acre 70 Part B) For each plot, calculate TPA (trees per acre) by dividing BAF/BA ft 2 for each tree based on the dbh that you recorded in the field. This is the number of trees per acre of that size tree and species. Sum all TPA values for all trees. This is the overall number of trees per acre based on your sampling. Use the table below to help you organize the data for Part B. Plot 1 Tree species DBH BA ft 2 TPA (BAF/BA ft 2 ) SUM (Total TPA) Plot2 Tree species DBH BA ft 2 TPA (BAF/BA ft 2 ) SUM (Total TPA)
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