Agenda - Environmental Policy Board - 07/19/2021

Home

Title 190-Forestry Inventory Methods Technical Note 100 feet. Variations of these two methods can be created by adjusting the number of seedlings counted in a row or the distance used within the row. o Ten Consecutive Seedling Count Method The 10 consecutive seedling count method is best used when all planted seedlings (live and dead) are present, planted at the original planned spacing, and natural tree and shrub regeneration will not be assessed. For a 10 consecutive seedling row plot— • Follow one row and assess 10 consecutive (live and dead) planted trees and shrubs in that row. • After 10 planted plants have been inspected within that row, move over one or more rows and repeat the procedure until the required number of plots has been assessed. To determine total number of surviving seedlings per acre— (# of live seedlings tallied ± # of plots) x 10 = % survival rate => (% survival rate x # of planted seedlings per acre) ± 100 = surviving seedlings per acre o 100-Foot Row Seedling Count Method The 100-foot row seedling count method is best used when individual seedling spacing varies within a row but spacing between rows is relatively consistent. Much like the circular plot, this type of linear plot can be used to assess natural regeneration that may be occurring within planted rows. Include natural regeneration tallies only if it helps meet planting objectives. To use this method— • Count the number of seedlings in a 100-foot distance along the row. If desirable natural tree and shrub regeneration help meet planting objectives, include those plants in the tally. • Measure the width between rows. • After the 100-foot distance has been inspected, move over one or more rows and repeat the procedure until the required number of plots has been assessed. • To determine average number of surviving seedlings per acre — Average distance between rows, feet x 100 feet ± 43560 sq ft/acre = area sampled, acres— => total # of live seedlings tallied ± # of plots = average # of seedlings per plot => average seedlings per plot ± area sampled, acre = surviving seedlings per acre. • Sampling Procedures o For any of the circular or linear plot methods, select plot locations in the planting area that best represent the variation of soils, topography, aspect, etc. Select a random starting spot (roughly 100 feet from the edge) in one corner of the planted area and install plots diagonally through the plantation. Alternatively, use two diagonals forming an "X" pattern. Record data on the "Tree and Shrub Planting Evaluation (Technical Note No. 190-FOR-01, Jul 2018) 16