{"Column":"1 / A","Field":"ref_id","Description":"Unique reference identification number for biomass equation source. Links to Reference table.","Column_type":"character"}
{"Column":"2 / B","Field":"equation_id","Description":"Unique equation identification number given arbitrarily. Links to Site_Species table.","Column_type":"character"}
{"Column":"3 / C","Field":"equation_allometry","Description":"Equation to calculate biomass (includes coefficients  given in original publication)","Column_type":"character"}
{"Column":"4 / D","Field":"equation_form","Description":"Algebraic form of the biomass equation (as function of DBH, HT, WD or others)","Column_type":"character"}
{"Column":"5 / E","Field":"dependent_variable","Description":"Tree component characterized by the equation","Column_type":"character"}
{"Column":"6 / F","Field":"independent_variable","Description":"Parameters included in biomass model (HT: tree height (m); DBH: diameter breast heigh (1.3 m); DBA: diameter at base; WD: wood density)","Column_type":"character","Units":"mm, cm, inch"}
{"Column":"7 / G","Field":"equation_taxa","Description":"Species, genus, family, or plant group for which the allometry was developed (sometimes used as proxy species to calculate AGB when a specific-species equation is not available)","Column_type":"character (string)"}
{"Column":"8 / H","Field":"allometry_specificity","Description":"Specific taxonomic level for which the biomass equation was developed (species, genus, family or plant group)","Column_type":"character"}
{"Column":"9 / I","Field":"equation_categ","Description":"Allometric equation category base on extend of original prediction model: \"fa_spec\" family specific model; \"genus_spe\" genus specific; \"site_spec\" and \"sp_site_spec\" equations built on ForestGEO sites; \"sp_spec\" prediction models focus on a specific species; \"generic\" equation applicable to a broader regional scale","Column_type":"character","Field_codes":"fa_spec; generic; genus_spec; site_spec; sp_site_spe; sp_spec"}
{"Column":"10 / J","Field":"geographic_area","Description":"Broad geographic location from which trees were sampled to develop the original equation","Column_type":"character"}
{"Column":"11 / K","Field":"original_coord","Description":"Latitude and longitude as given in original publication","Column_type":"character"}
{"Column":"12 / L","Field":"lat","Description":"Latitude expressed in decimal degrees. Positive latitudes are north of the equator, negative latitudes are south of the equator. Used NOAA for conversion: https://www.ngs.noaa.gov/NCAT/","Column_type":"numeric","Range":"(18) / (66)"}
{"Column":"13 / M","Field":"long","Description":"Longitude expressed in decimal degrees. Positive longitudes are east of Prime Meridian, negative longitudes are west of the Prime Meridian. Used NOAA for conversion: https://www.ngs.noaa.gov/NCAT/","Column_type":"numeric","Range":"(-155) / (131)"}
{"Column":"14 / N","Field":"elev_m","Description":"Elevation in meters above sea level (sometimes a range is given). Data from original publication or estimated by using an online tool to get elevation from coordinates (https://www.maps.ie/coordinates.html)","Column_type":"numeric","Units":"meters","Range":"(3) / (3500)"}
{"Column":"15 / O","Field":"geography_notes","Description":"Notes pertaining to lat, long, location, or topography","Column_type":"character"}
{"Column":"16 / P","Field":"mat_C","Description":"Mean annual temperature in Celsius degrees as original publication or predicted using the latitude and longitude in the WorldClim database.","Column_type":"numeric","Units":"celsius degrees","Range":"(-4.9) / (25)"}
{"Column":"17 / Q","Field":"min.temp_C","Description":"Mean temperature of the coldest month","Column_type":"numeric","Units":"celsius degrees","Range":"(-31) / (5.7)"}
{"Column":"18 / R","Field":"max.temp_C","Description":"Mean temperature of the warmest month","Column_type":"numeric","Units":"celsius degrees","Range":"(12) / (32)"}
{"Column":"19 / S","Field":"map_mm","Description":"Mean annual precipitation in millimeters (multiply by 25.4 to convert from inch to mm) or predicted using the latitude and longitude in the WorldClim database.","Column_type":"numeric","Units":"mm","Range":"(216) / (6000)"}
{"Column":"20 / T","Field":"frost_free_period_days","Description":"Frost free period (days) as reported or inferred from original publication","Column_type":"numeric"}
{"Column":"21 / U","Field":"climate_notes","Description":"Climate details not included in equation table","Column_type":"character"}
{"Column":"22 / V","Field":"stand_age_range_yr","Description":"Stand age (or range) as reported or inferred from original publication","Column_type":"numeric"}
{"Column":"23 / W","Field":"stand_age_history","Description":"Qualitative description of the stand history reported or inferred from original publication","Column_type":"character"}
{"Column":"24 / X","Field":"stand_basal_area_m2_ha","Description":"Stand basal as reported in original publication (m2 x ha)"}
{"Column":"25 / Y","Field":"stand_trees_ha","Description":"Number of trees per hectare (average or absolute) as reported in original publication"}
{"Column":"26 / Z","Field":"forest_description","Description":"Brief description of stand, summarized from original publication, including species composition","Column_type":"character"}
{"Column":"27 / AA","Field":"ecosystem_type","Description":"General classification on terrestrial ecosystem (tropical forest, temperate forest, boreal forest, mountain forest, desert, grassland)","Column_type":"character"}
{"Column":"28 / AB","Field":"koppen","Description":"Koppen climate classification, estimated using the package 'kgc\" (based on lat/long) or by visual estimates from a Koppen zones map, especially for generic equations.","Column_type":"character","Field_codes":"Multiple"}
{"Column":"29 / AC","Field":"dbh_min_cm","Description":"Minimum DBH (cm) sampled to develop the equation","Column_type":"numeric","Units":"cm","Range":"(0.1) -/ (31)"}
{"Column":"30 / AD","Field":"dbh_max_cm","Description":"Maximum DBH (cm) sampled to develop the equation","Column_type":"numeric","Units":"cm","Range":"(0.69) / (614)"}
{"Column":"31 / AE","Field":"sample_size","Description":"Number of trees sampled to develop the equation","Column_type":"integer","Range":"(3) / (5397)"}
{"Column":"32 / AF","Field":"collection_year","Description":"Year(s) of measurement if in publication","Column_type":"integer"}
{"Column":"33 / AG","Field":"dbh_units_original","Description":"DBH unit used in original publication","Column_type":"character","Field_codes":"cm: centimeters; inch: inches; mm: millimeters","Units":"cm, inch, mm"}
{"Column":"34 / AH","Field":"dbh_unit_cf","Description":"Conversion factor applied to convert DBH unit used in original publication into an equivalent expressed in cm. Multiply by number given in table.","Column_type":"numeric"}
{"Column":"35 / AI","Field":"output_units_original","Description":"Mass or length unit used in original publication","Column_type":"character","Field_codes":"g= grams; kg= kilograms; lbs= pounds; metric_ton= metric ton; Mg= megagrams; m= meters","Units":"g, kg, Mg, m"}
{"Column":"36 /AJ","Field":"output_units_cf","Description":"Conversion factor applied to convert unit used in original publication (mass or length) into an equivalent expressed in kg or m. Multiply by number given in table.","Column_type":"numeric"}
{"Column":"37 / AK","Field":"allometry_development_method","Description":"Method used to develop the allometry. Traditionally, this is done by harvesting whole trees, drying, and weighing (\"harvest\").  However, we anticipate that many future allometries will be developed using ground-based LiDAR (\"lidar\").","Column_type":"character","Field_codes":"harvest; lidar"}
{"Column":"38 / AL","Field":"regression_model","Description":"Regression model used in original publication","Column_type":"character"}
{"Column":"39 / AM","Field":"r_squared","Description":"Original R-squared value given in publication for fitted regression","Column_type":"numeric"}
{"Column":"40 / AN","Field":"other_equations_tested","Description":"Comparable models if reported in publication (given equation form)","Column_type":"character","Field_codes":"NRA - Not Readily Available"}
{"Column":"41 / AO","Field":"log_biomass","Description":"Whether the regression fit is done with biomass as the response variable (i.e log(biomass) base 10)","Column_type":"numeric","Field_codes":"0 - false; 1 - true"}
{"Column":"42 / AP","Field":"bias_corrected","Description":"Indicates if a correction factor (CF) or a relative standard error (RSE) was included in model","Column_type":"numeric","Field_codes":"0 - false; 1 - true"}
{"Column":"43 / AQ","Field":"bias_correction_factor","Description":"Correction factor for a bias introduced by logarithmic transformation of the data; pulled from original publication. NA indicates that bias correction is included in model (and no CF was provided).","Column_type":"numeric"}
{"Column":"44 / AR","Field":"notes_fitting_model","Description":"Other details on statistical methods","Column_type":"character"}
{"Column":"45 / AS","Field":"original_equation_id","Description":"Unique identification or clues given in original publications","Column_type":"character"}
{"Column":"46 / AT","Field":"original_data_availability","Description":"Indicates whether or not the original source data is available","Column_type":"character","Field_codes":"NRA= Not Readily Available, Yes= data accessible"}
{"Column":"47 / AU","Field":"equation_notes","Description":"Notes or error message to indicate any pitfall that could spoil the AGB estimate based on equation","Column_type":"character"}