FOR00102 Plot Measurement and Point Sampling of Stands Assignment Sample

Measuring Trees and Forests

Contents

Introduction

Aim

Objectives

Importance

Location of the survey

Equipment used in survey

Methodology

Data collections and results

Conclusion

Introduction to Plot Measurement

Plot measurement is the procedure of obtaining data describing the factors of process in order to improve the quality of process. We measured the stand basal area, stocking density and volume. Surveying differs from person to person and also we got the different way of measurement. The use of this plot measurement is it helped us to acknowledge the tree spacing for the forestry use, benefits and problems.

Aim

The aim of plane survey of Pamplemousse park is to study the management of forest with its tree distance and also to study the whole forest area with maintaining forest sustainability and preservation. The aim of this plot measurement and sampling is to be capable of knowing the tree spacing to create healthy and productive forest through different equipment.

Objectives

• To study the distance between the trees
• To make the plot and apply different techniques for obtaining more accurate data.
• To measure diameter and height of the healthy trees.
• To be able to use all three sampling devices; thumb, dendrometer and prism.
• To compare the method of strand measurements.
• To determine stand stocking density.
• To determine stand basal area.
• To study the land topographically of forest.
• To study the management expenses of forest
• To maintain forest sustainability.
• To study the irregularities of boundary and tactfully define the plantation theme.
• To be able to form the precautions and suggestions to be held for maintaining the forest quality as a forester.
• To produce healthy forest and protect forest and its trees.

Location of the survey:

This plane survey was a plantation survey of mixed species rainforest planting on Mr. John Gough’s Property, ‘Pamplemousse park’, 95McLeans Ridge Rd, Wollongbar, established in 1997.

Equipment used in the survey:

We used diameter tapes to make 10*10 plot, 30m measuring tape to measure distance, Clinometer to study the slope and height of the tree, wooden peg to mark the plot, crayons and flagging tapes to mark the trees and make our plot different than other groups, pen and paper to note the data collected.

Methodology of Plot Measurement and Point Sampling of Stands

1. The exercise was held in the mixed-species rainforest planting on Mr John Gough’s property, ‘Pamplemousse Park’, 95 McLeans Ridge Rd,Wollongbar.
2. In groups of four, we established a rectangular plot of about 10×10 m; in the plantation, the plot size will be determined partly by the tree spacing. Marked the four corners of the plot with pegs and flagging tape.
3. We measured the diameter at breast height over bark (cm) and total height of each tree in your plot.
4. At a convenient location near the centre of your plot, measured the stand basal area by point sampling, that is by doing a circular sweep and counting the number of trees in the sample.

a) Their thumb.

The factor for your thumb (β), to give stand basal area in m2/ha, is given by

β = 10⁴[W/2]²/[(W/2)²+D²] ,

where W is the width of your thumb (cm) and D is the distance (cm) from our eye to your thumb.

b) The supplied ‘point sampling dendrometer. We sweeped about 10-15 trees.

c) A point sampling prism of appropriate factor.

• We have to decide which of the ‘point sampling dendrometer’ or the point sampling prism you prefer. Take a single point sample for our group with this device. We measured the diameter at breast height over bark and the total height of each tree which is included in the point sample.

Data Collection and Results of Plot Measurement and Point Sampling of Stands

At the end of the survey we were able to collect the following data and result:

Conclusion on Plot Measurement and Point Sampling of Stands

With this plot measurement of Gough’s property, we were able to conclude following things:

• We concluded through each of the measurement technique and found the difference in plot basal area, stand basal area, stand stocking density and volume.
• From plot measurement we measured plot basal area of 0.4 square meters
• From plot measurement we measured stand basal area of 32 square meters per hectares whereas from group sampling method we measured stand basal area of 32 square meters per hectares.
• The personal sampling method using thumb we observed stand basal area of 28.8 square meters per ha and using dendrometer stand basal area of 26 square meters per ha and using prism the stand basal area of 28square meters per ha which seems quite close.
• By the end of this point sampling we were able to distinguish the best sampling tool, which I personally preferred was point sampling prism as it gives more accurate result than that of point sampling dendrometer.
• After this measurement, we could conclude that management of trees is the main backbone for the growth and development of forest.
• Plot measurement teaches to deal with sustainability using mathematical terms.
• Hence, we could say that plot measurement and sampling need to be done in order to maintain the forest growth and have positive outcomes from forest.

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