Subdivision Subdiv 3 - Carbon Credits (Carbon Farming Initiative—Estimation of Soil Organic Carbon Sequestration Using Measurement and Models) Methodology Determination 2021 - Working out the soil organic carbon stock and sampling variance for a CEA in all circumstances other than when compositing of cores is across equal area strata | Zoe
Carbon Credits (Carbon Farming Initiative—Estimation of Soil Organic Carbon Sequestration Using Measurement and Models) Methodology Determination 2021
Subdiv 3Working out the soil organic carbon stock and sampling variance for a CEA in all circumstances other than when compositing of cores is across equal area strata
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Subdivision 3—Working out the soil organic carbon stock and sampling variance for a CEA in all circumstances other than when compositing of cores is across equal area strata
19 Application of this Subdivision
This subdivision applies to sampling which:
(a) involves:
(i) preparation and analysis of soil samples from individual cores; or
(ii) compositing of cores within strata; or
(iii) analysis of intact cores; and
(b) comprises strata which are equal or unequal in area across a CEA; and
(c) is not covered by Subdivision 2.
20 Mean soil organic carbon stock in a stratum
Work out the mean soil organic carbon stock for each stratum h (the View image in the official source), in the CEA, in tonnes of soil organic carbon per hectare, using the following equation:
n is the number of samples collected from the stratum h.
SOCi is the soil organic carbon stock for each sample i from stratum h, in tonnes of soil organic carbon per hectare, worked out using equation 52 or 53.
21 Sampling variance of the mean soil organic carbon stock within a stratum
Work out the sampling variance of the mean soil organic carbon for each stratum h in the CEA (the View image in the official source, in (tonnes of soil organic carbon per hectare)2, using the following equation:
SOCi is the soil organic carbon stock for each sample i from stratum h, in tonnes of soil organic carbon per hectare, worked out using equation 52 or 53.
View image in the official source is the mean soil organic carbon stock in the stratum h, in tonnes of soil organic carbon per hectare, worked out using equation 58.
22 Mean soil organic carbon stock in a CEA
Work out the mean soil organic carbon stock in the CEA (the View image in the official source), in tonnes of soil organic carbon per hectare, using the following equation:
View image in the official source is the relative area of the CEA covered by stratum h in the CEA, expressed as a proportion of the total CEA area.
View image in the official source is the mean soil organic carbon stock in the stratum h, in tonnes of soil organic carbon per hectare, worked out using equation 58.
23 Sampling variance of the mean soil organic carbon stock within a CEA
Work out the sampling variance of the mean soil organic carbon for the CEA (the View image in the official source, in (tonnes of soil organic carbon per hectare)2, using the following equation:
View image in the official source is the relative area of the CEA covered by stratum h in the CEA, expressed as a proportion of the total CEA.
View image in the official source is the sampling variance of the mean soil organic carbon for stratum h, in (tonnes of soil organic carbon per hectare)2, worked out using equation 59.
24 Total soil organic carbon stock for a CEA
Work out the total soil organic carbon stock for the CEA (the SOCCEA), in tonnes of soil organic carbon, using the following equation:
View image in the official source is the mean soil organic carbon stock for the CEA, in tonnes of carbon per hectare, worked out using equation 60.
25 Sampling variance of the soil organic carbon stock for a CEA
The sampling variance of soil organic carbon stock for the CEA (the View image in the official source), in (tonnes of soil organic carbon)2, is worked out using the following equation:
View image in the official source is the sampling variance of the mean of the soil organic carbon in the CEA, in (tonnes of soil organic carbon per hectare)2, worked out using equation 61.
26 Working out the creditable change in soil organic carbon stock in a CEA for a reporting period
Subject to subsection 9(4) of this Schedule, the creditable change in soil organic carbon in a CEA with a specified probability of exceedance for a reporting period (the View image in the official source), in tonnes of soil organic carbon, must be worked out in accordance with this Division.