Main Experiment: Wood stubs of Site A and B: measurement of saw dust from wood samples

Usage Rights

This data is Free within projects.

members of the project

Dataset Abstract

This piece of data are the weight measurements of the wood samples from the data set:

Wood stubs of Site A and B: quantity, density, position and decomposition class

Samples were taken in a sub plot in all VIP on both sites A and B. The sub plot was defined as the inner square that is stretched by the planted trees of positions: 06:06, 06:14, 14:06 and 14:14,which is approximately a square with a side length of 10.4 meters.
In every Plot for every DC (Decomposition Classes) two wood samples (one with a scope over 63 cm and one witch a scope under 63 cm) had been taken, if these DC with the sizes existed. A hole was drilled with the length of the radius of the stub. The actual depth of the hole was measured. The saw dust was collected and dried at 60 degree celsius. With the weight and the calculated volume of the hole the wood density was measured.
The measurements were taken to calculate an explanatory variable for the DC.
For further information look in the workbook from the data set:

Wood stubs of Site A and B: quantity, density, position and decomposition class

Dataset Design

Samples were taken in a sub plot in all VIP on both sites A and B. The sub plot was defined as the inner square that is stretched by the planted trees of positions: 06:06, 06:14, 14:06 and 14:14,which is approximately a square with a side length of 10.4 meters.
Also for every DC two wood samples (one with a scope over 63 cm and one witch a scope under 63 cm) had been taken, if these DC with the sizes existed. For sampling always the first stub that did

Spatial Extent

Main Experiment, Site A and B
29°08'-29°11'N
117°90'-117°93'E
Samples were taken in a sub plot in all VIP on both sites A and B. The sub plot was defined as the inner square that is stretched by the planted trees of positions: 06:06, 06:14, 14:06 and 14:14,which is approximately a square with a side length of 10.4 meters.
In every Plot for every DC (Decomposition Classes) two wood samples (one with a scope over 63 cm and one witch a scope under 63 cm) had been taken, if these DC with the sizes existed. A hole was drilled with the length of the radius of the stub. The actual depth of the hole was measured.
The saw dust was collected and dried at 60 degree celsius. With the weight and the calculated volume of the hole the wood density was measured in two ways.
The Density was measured in to ways in the assumption that the hole is shaped like a conus or as a cylinder. The formula for them was:
Cone = depth of the hole*radius of the driller^2*pi
Cylinder= ((depth of the hole*pi)/3) * (radius of the hole ^2 + radius of the driller* radius of the hole + radius of the driller^2)
As unit for the density g/cm^3 was used.
density = g/cm

Measurement Circumstances

Are there circumstances that explain the precision of your measurements? Could it be that a sandstorm destroyed part of the plots in a given year?

Data Analysis

he measurements were taken to calculate an explanatory variable for the DC in the data set:
Measurement of wood stubs of Site A and B: quantity, density, position and decomposition class

Data columns available in the raw data part of this dataset

number
number of the sample equivalent to subsample in the other data set
Data group: Helper
Values
4
2
3
1
5
* These persons could not be matched within the portal: John Anders also contributed to this column.
weight
weight of the wood
Unit: g
Data group: Above and below ground biomass measurement
Values
10.109
10.089
10.297
10.248
10.189
* These persons could not be matched within the portal: John Anders also contributed to this column.
height
the depth of the hole that was drilled; Datagroup description: the depth of the hole that was drilled; Instrumentation: caliper
Unit: cm
Data group: Helper
Values
10.4
10.5
10.2
11
10.1
* These persons could not be matched within the portal: John Anders also contributed to this column.
diameter
measured diameter of the drilled hole
Unit: cm
Data group: Helper
Values
2.2
2
2.3
2.1
2.4
* These persons could not be matched within the portal: John Anders also contributed to this column.
damaged_bag
was the bag damaged and was replaced
Data group: Helper
Values
1
0
* These persons could not be matched within the portal: John Anders also contributed to this column.
sample_quality
defines whether sample material was lost into caveats within stump
Data group: Helper
Values
0
1
box
storage box number
Data group: Helper
Values
4
2
3
1
5
* These persons could not be matched within the portal: John Anders also contributed to this column.
site
Site where the sample has been taking
Data group: Experimental Site
Values
A
B
* These persons could not be matched within the portal: John Anders also contributed to this column.
plot
plot code where the sample has been taking
Data group: Plot name Main experiment (letter, number code)
Keywords: plot
Values
D29
E33
C32
E34
E31
* These persons could not be matched within the portal: John Anders also contributed to this column.
Vol_cyl
calculated volume of the hole that was drilled. With the assumption that the hole is a cylinder with the base of the drill
Unit: cubic centimeter
Data group: Volume of an object
Values
10.0530964915
10.3672557568
10.6814150222
10.0444571117
10.7371782918
* These persons could not be matched within the portal: John Anders also contributed to this column.
Vol_cone
calculated volume of the hole that was drilled. With the assumption that the hole is a cone with the base of the drill and the base that is calculated from the measured scope of the hole.
Unit: cubic centimeter
Data group: Volume of an object
Values
10.0530964915
10.2339998685
10.3672557568
10.5641288965
10.3986716834
* These persons could not be matched within the portal: John Anders also contributed to this column.
dens_cyl
weight / Vol_cyl
Unit: g/cm³
Data group: Wood density
Keywords: wood density
Values
0.0531238268
0.044566479000000006
0.038371758000000006
0.0325494181
0.050583122
* These persons could not be matched within the portal: John Anders also contributed to this column.
dens_cone
weight / Vol_cone
Unit: g per cubic centimeter
Data group: Wood density
Values
0.0488750207
0.037189291900000004
0.0557357834
0.053070159000000006
0.0455401084
* These persons could not be matched within the portal: John Anders also contributed to this column.