The Effects Of Sample Plot Size And Shape On Accuracy Of Inentory Using Systematic Sampling In Acaica Nilotica (Sunt) Plantation:Case Study Sawlell Forest In Blue Nile Sudan
The Effects Of Sample Plot Size And Shape On Accuracy Of Inentory Using Systematic Sampling In Acaica Nilotica (Sunt) Plantation:Case Study Sawlell Forest In Blue Nile Sudan
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Date
2015-04-21
Authors
YOUSIF, EL AMIN
Journal Title
Journal ISSN
Volume Title
Publisher
UOFK
Abstract
The present study compares between different sizes and shapes of sample plot
in forest inventory depending on systematic sample method in Sawlell forest in
the Blue Nile State.
Different sample plot sizes of Acacia nilotica, by namely 0.05, 0, 1 , 0.15
hectare with different shapes: circular, square, rectangular were compare to
find their effect on forest inventories concerning diameter at breast height,
basal area, height, number of trees, and volume estimates the complete
enumeration was taken as control.
The selected study area was Sawlell forest in Blue Nile State. The forest age is
approximately 21 years the research was done in Maya site. The karab site is
not re preventative area and for graf site is covers by the plantation of khaya
senegalensis , Eucaly ptus and Tectona grandis.
The study showed significant difference between the different sizes and shapes
of the sample plots .The study clearly indicates that the most accurate results
of diameter, height, basal area, number of trees and volume estimates were
achieved by circular sample plots compared to square and rectangular sample
plots.
The present study indicated that the total number of trees obtained by 0.1
hectare systematic sampling is close to the total number of trees for the
compartment given by the total enumeration. Also the results indicated that the
diameter distribution using 4.0 cm class range is similar to the distribution
provided by the complete enumeration
Description
Keywords
EFFECTS,SAMPLE PLOT,SIZE,SHAPE,ACCURACY,INENTORY,SYSTEMATIC,SAMPLING ,ACAICA,NILOTICA,PLANTATION: