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Table 10 Soil sampling depth statistics for studies included in the systematic map

From: What are the effects of agricultural management on soil organic carbon in boreo-temperate systems?

Number of samples per soil profile (cm)Maximum depth sampled (cm)
StatisticValueStatisticValue
Minimum1Minimum2.5
Maximum20Maximum330
Mean2.28Median20
Standard deviation1.97Mean29.84
Studies failing to mention number of soil depths sampled33Standard deviation25.50
Total number of studies737Studies failing to mention maximum sampling depth54
Studies taking 1 sample per soil profile382Total number of studies737
Studies taking 2 samples per soil profile90Studies sampling to 25 cm depth or more257
  1. Number of samples per soil profile refers to the number of individual subsamples taken from each core across different depths where data are reported separately for each sample. Maximum depth sampled refers to the deepest extent to which soil samples were taken where data are reported