Laserfiche WebLink
Title 190-Forestry Inventory Methods Technical Note <br />Form," or a similar data collection form adapated to the setting (see fig. 9 in this <br />section). <br />o To collect enough data for a reliable survival estimate, use at least the number of plots <br />shown in table 5. For windbreaks and sites with highly variable soils, hydrology, etc., <br />consider increasing the number of plots per acre, to increase the confidence level of <br />the data collected. <br />❑m® Minimum Number of Circular or Linear Plots Needed for Reliable Seedling Survival <br />Estimates in Planted Areas of Different Sizes <br />❑ ItEE❑1-11111= EIT==k Ell <br />Minimum number of circular plots needed <br />< 5 ac. <br />5 plots <br />6 to 10 ac. <br />1 plot per ac. <br />> 10 ac. <br />10 plots + 1 lot/additional 5 ac. <br />❑ [IDE[Ir 110= <br />Minimum number of linear plots needed* <br />< 5 ac. <br />3 plots <br />6 to 10 ac. <br />1 plot per every 2 ac. <br />> 11 ac. <br />5 plots + 1 lot/additional 10 ac. <br />*Double the number of plots for windbreaks. <br />(Technical Note No. 190-FOR-01, Jul 2018) <br />17 <br />