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1
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Study ID
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First author
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Mainly last name of the first author
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Publication year
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Year the article is published
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Numbering
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Code for each data point in the study
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2
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Name of research group
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Research group
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Listing the research group that implemented the research and experiment
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3
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Validity of a study
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Validity of a study
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Internal and external validity of a study that will be assessed as “low”, “moderate” or “high” risk of bias
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4
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Type of paper
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Peer-reviewed
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If the paper is published in a peer-reviewed journal
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Gray literature
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If it is a publication in a website, or a dissertation/thesis, or conference summaries
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5
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Study location
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Study area
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The area where the study has been conducted
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Longitude and latitude
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The longitude and the latitude of study area
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Country
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The country where the study area is located
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Type of climate
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Classification of climate of the country
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Average precipitation
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Expressed in mm: Average precipitation in study area
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6
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Experimental condition
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Condition
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Listing if it is randomized replicates or different
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Experimental design
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If it is based on open field, greenhouse, or lab
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Design characteristics
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Plot area, number of plots, or pots (if it is greenhouse or lab experiment)
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Experimental setup
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Control (without amendment, or with fertilizer or with manure), treatment (with biochar, or fertilizer + biochar, or manure + biochar)
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Duration of experiment
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Expressed in days
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Biochar application rate
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Expressed in t/ha
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7
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Biochar properties
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Feedstock used
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The feedstocks used for pyrolysis will be grouped as “woody biomass”, “manure”, “peat-based”, and “agricultural residue”
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Pyrolysis temperature
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Expressed in the Celsius scale
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Carbon rate
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Expressed in g per kg (g/kg) and mass percentage
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8
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Soil status
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Type of soil
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Type of sandy soil and contaminated soil used for the experiment
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Soil sample depth
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The minimum and maximum soil depth at which biochar is applied; expressed in cm
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Soil treatment before biochar
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NPK fertilizer, manure, or other treatments
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Soil condition
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Soil is tilled or irrigated before the experiment
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9
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Ecosystem services (ESS)
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Measurement
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List of ESS measured in the study
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Measurement unit
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Unit used to measure ESS
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10
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Changes in ecosystem services
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Control (without amendment, or with manure, or with fertilizer)
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Means, SD, correlation, OR t-value OR F-score
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Treatment (with biochar only, or with manure + biochar, or fertilizer + biochar)
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Means, SD, correlation, OR t-value OR F-score
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