equations: Table of allometric equations.
equations_metadata: Explanation of columns for equations table.
Format
An object of class spec_tbl_df (inherits from tbl_df, tbl, data.frame) with 570 rows and 47 columns.
An object of class spec_tbl_df (inherits from tbl_df, tbl, data.frame) with 47 rows and 7 columns.
Source
See references for equations original sources.
Details
A compilation of best available allometry equations to calculate tree above-ground biomass (AGB) per species based on extratropical ForestGEO sites.
See also
Other database datasets:
missing_values,
references,
sites_info,
sitespecies
Examples
# preview the datasets
print(head(equations))
#> # A tibble: 6 × 47
#> ref_id equation_id equation_allometry equation_form dependent_variable
#> <chr> <chr> <chr> <chr> <chr>
#> 1 barney_1977_b… 4b4063 exp(3.63+2.54*log… exp(a+b*log(… Total aboveground…
#> 2 baskerville_1… e2c7c7 exp(0.15+2.48*log… exp(a+b*(log… Total aboveground…
#> 3 bohn_2014_ocai e42e41 exp((1.091*(log(d… exp((a*(dbh-… Total aboveground…
#> 4 bohn_2014_ocai 2bc879 dbh/((1/1.711)+(d… dbh((1/a)+(d… Height
#> 5 bohn_2014_ocai 9f138f exp((1.202*(log(d… exp((a*(dbh-… Total aboveground…
#> 6 bohn_2014_ocai 7a3dce dbh/((1/1.919)+(d… dbh((1/a)+(d… Height
#> # ℹ 42 more variables: independent_variable <chr>, equation_taxa <chr>,
#> # allometry_specificity <chr>, equation_categ <chr>, geographic_area <chr>,
#> # original_coord <chr>, lat <chr>, long <chr>, elev_m <chr>,
#> # geography_notes <chr>, mat_C <chr>, min.temp_C <chr>, max.temp_C <chr>,
#> # map_mm <chr>, frost_free_period_days <chr>, climate_notes <chr>,
#> # stand_age_range_yr <chr>, stand_age_history <chr>,
#> # stand_basal_area_m2_ha <chr>, stand_trees_ha <chr>, …
print(head(equations_metadata))
#> # A tibble: 6 × 7
#> Column Field Description Column_type Field_codes Units Range
#> <chr> <chr> <chr> <chr> <chr> <chr> <chr>
#> 1 1 / A ref_id Unique refere… character NA NA NA
#> 2 2 / B equation_id Unique equati… character NA NA NA
#> 3 3 / C equation_allometry Equation to c… character NA NA NA
#> 4 4 / D equation_form Algebraic for… character NA NA NA
#> 5 5 / E dependent_variable Tree componen… character NA NA NA
#> 6 6 / F independent_variable Parameters in… character NA mm, … NA