FORESTRY
GENERAL FORESTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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variable plot
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strip cruising
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radius plot method
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fixed plot method
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Detailed explanation-1: -The point-sampling method makes use of an angle-gauge or a wedge prism. A cruiser counts the number of trees around a sampling point whose diameters at breast height appear larger than the crossarm of the angle-gauge (Fig. 1).
Detailed explanation-2: -Prism sampling is a vegetation sampling technique used to determine basal area, species composition, density, and timber volume of trees. It has numerous applications in forestry, wildlife management, and other natural resources disciplines.
Detailed explanation-3: -Variable-radius plots (VRPs), also referred to as point sampling or prism cruising, rely on the relationship between the diameter at breast height (DBH) of observed trees and the distance between those trees and an observer who stands at plot center.
Detailed explanation-4: -With a prism you need to use the prism as the centre of the plot and rotate around it. Multiply the number of in trees by 2 to get the basal area for the stand in square meters per ha. (For example, if you count 20 trees, your basal area is 40 square metres per hectare).