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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)
Statistic Value Statistic Value
Minimum 1 Minimum 2.5
Maximum 20 Maximum 330
Mean 2.28 Median 20
Standard deviation 1.97 Mean 29.84
Studies failing to mention number of soil depths sampled 33 Standard deviation 25.50
Total number of studies 737 Studies failing to mention maximum sampling depth 54
Studies taking 1 sample per soil profile 382 Total number of studies 737
Studies taking 2 samples per soil profile 90 Studies sampling to 25 cm depth or more 257
  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