| code_to_level | Determine taxonomic level of a taxonomic letter code |
| decompose_taxon_code | Decompose taxon letter codes |
| explainST | Explain a taxon name using formative elements |
| extractSMR | Extract Soil Moisture Regime from Subgroup or Higher Level... |
| FormativeElements | Identify formative elements in taxon names at Soil Order,... |
| getChildTaxa | Get the lower (child) taxa for a taxon name or code |
| getLastChildTaxon | Get last child taxon in Keys at specified taxonomic level |
| getParentTaxa | Get the higher (parent) taxa for a taxon name or code |
| get_ST_family_classes | Get soil family / series differentiae and class names |
| get_ST_features | Get soil diagnostic horizons, characteristics and features |
| getTaxonAtLevel | Get the taxon name at the Soil Order, Suborder, Great Group... |
| hierarchy | Parent/Child Hierarchy |
| isValidST | Check for valid taxonomic level (Order, Suborder, Great... |
| level_hierarchy | Order of Hierarchical Levels in Soil Taxonomy |
| level_to_taxon | Get all taxa at specified level |
| newick_string | Generate Newick Tree Format Parenthetic Strings |
| parse_family | Parse components of a "family-level" taxon name |
| preceding_taxon_codes | Get taxon codes of preceding taxa |
| relative_taxon_code_position | Determine relative position of taxon within Keys to Soil... |
| SoilTaxonomyLevels | Get (Ordered) Factors based on Soil Taxonomy Key position |
| SoilTaxonomy-package | SoilTaxonomy: A System of Soil Classification for Making and... |
| ST | Soil Taxonomy Hierarchy |
| ST_family_classes | Family-level Classes for Soil Taxonomy |
| ST_features | Epipedons, Diagnostic Horizons, Characteristics and Features... |
| ST_formative_elements | Formative Elements used by Soil Taxonomy |
| ST_higher_taxa_codes_12th | Letter Code Lookup Table for Position of Taxa within the Keys... |
| ST_higher_taxa_codes_13th | Letter Code Lookup Table for Position of Taxa within the Keys... |
| taxon_code_to_taxon | Convert taxon code to taxon name |
| taxon_to_level | Determine taxonomic level of specified taxa |
| taxon_to_taxon_code | Convert taxon name to taxon code |
| taxonTree | Create a 'data.tree' Object from Taxon Names |
