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Table 10 Commonly missing meta-data and data from the evidence base within this review

From: How does tillage intensity affect soil organic carbon? A systematic review

Missing informationNo. of studies% of evidenceDescription
Soil description3711Studies lacking any description of soil type
Study duration10.3Study lacks any description of how long the experiments lasted
Study timing206Studies lacking information on when the experiments started and ended
Study design298Studies lacking information about the experimental design (i.e. randomisation, blocking, split-plot, strip-plot, latin square, paired design, purposive)
Spatial replication185Studies lacking details of how many true spatial replicates were sampled
Temporal replication30.9Studies lacking information of how many samples were taken over time
Soil sampling depth10.3Studies lacking information on how many soil samples were taken and at what depth
Tillage description10831Studies lacking information on the type and intensity of tillage treatments
Measure of variability19656Studies failing to report a measure of variability around treatment means