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2.3 Biological Characteristics
Area of quadrat
x
=
________ in
________ in
2
________ in
x
Diameter ÷ 2
Area of quadrat
in inches squared
Diameter ÷ 2
x 3.14 =
________ in
2
x
x 3.14 =
________ in
________ in
x
Width
Length
Area of quadrat
in inches squared
=
Total biomass per quadrat
Add up all of the plant biomass weights in pounds (lbs) and then divide
by the total number of quadrats you sampled to get the average
÷
Number of
quadrats
Average lbs of
biomass per quadrat
Sum of all the plant
biomass weights
=
÷
________
________ lbs
________ lbs
=
÷
Average lbs of
biomass per quadrat
Average biomass per quadrat
in lbs per inches squared
=
Area of quadrat
in inches squared
÷
________ lbs
________ lbs/in
2
=
________ in
2
Scale up from the quadrats to lbs per acre
x 6273000 =
Average biomass per quadrat
in lbs per inches squared
lbs per acre
x 6273000 =
________ lbs/in
2
________ lbs/acre
Calculations
You will extrapolate from your plots to a larger area of land
by converting the mass per quadrat to pounds per acre.
For a
square
For a
circle
Activity
continued
on next
page