{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.calcifuge","code":"thing-q1151696","url":"https://ver.cy/models/thing/q1151696/","name":"Calcifuge","alternateNames":["Hamamelis vernalis","Fothergilla major","Embothrium coccineum","Crinodendron hookerianum","Cassiope lycopodioides"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.LIV"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A plant that does not tolerate alkaline or lime-rich soil and grows best in acidic conditions, such as rhododendrons, azaleas, camellias, heathers, blueberries and species such as Fothergilla major, Embothrium coccineum, Crinodendron hookerianum and Cassiope lycopodioides, in contrast to calcicole plants that favour lime; calcifuges suffer chlorosis on alkaline soils because iron and other nutrients become unavailable, and gardeners grow them in ericaceous compost.","purpose":"Let an agent explain calcifuge plants and why they avoid lime, identify common calcifuges, relay horticultural practice for acid-loving plants, and distinguish calcifuges from calcicoles and from plants with other soil preferences.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Lime intolerance","Iron chlorosis on alkaline soil","Ericaceous associations","Acid compost cultivation"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a calcifuge is.","layers":[{"id":"definition","name":"Definition","description":"Definition and mechanism.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is a calcifuge, and why do such plants fail on lime-rich soil?","kind":"definition"},{"text":"Is the plant a calcifuge, a calcicole or indifferent to lime?","kind":"boundary"}]}]},{"id":"examples","name":"Examples","description":"Examples.","findings":[{"id":"examples-finding","name":"Examples","description":"Examples.","questions":[{"text":"Which common garden and wild plants are calcifuges?","kind":"definition"},{"text":"Which entry fits the specific species?","kind":"action"}]}]}]},{"id":"grow","name":"Grow","description":"Horticulture.","layers":[{"id":"soil","name":"Soil","description":"Soil and compost.","findings":[{"id":"soil-finding","name":"Soil","description":"Soil.","questions":[{"text":"How are calcifuges grown, including soil testing, ericaceous compost and acidifying treatments?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"problems","name":"Problems","description":"Chlorosis and care.","findings":[{"id":"problems-finding","name":"Problems","description":"Problems.","questions":[{"text":"How is lime-induced chlorosis recognised and treated?","kind":"provenance"},{"text":"Which entry fits chlorosis?","kind":"action"}]}]}]},{"id":"ecology","name":"Ecology","description":"Ecology.","layers":[{"id":"habitats","name":"Habitats","description":"Habitats.","findings":[{"id":"habitats-finding","name":"Habitats","description":"Habitats.","questions":[{"text":"In what habitats such as heathland and acid woodland do calcifuges dominate?","kind":"provenance"},{"text":"Which entry fits heathland?","kind":"action"}]}]},{"id":"physiology","name":"Physiology","description":"Physiology.","findings":[{"id":"physiology-finding","name":"Physiology","description":"Physiology.","questions":[{"text":"What do studies say about the physiological basis of lime intolerance?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"context","name":"Context","description":"Debates and terminology.","layers":[{"id":"peat","name":"Peat","description":"Peat debate.","findings":[{"id":"peat-finding","name":"Peat","description":"Peat.","questions":[{"text":"What debates surround peat use in ericaceous compost, with positions attributed?","kind":"provenance"},{"text":"Is the presentation neutral?","kind":"boundary"}]}]},{"id":"terms","name":"Terms","description":"Terminology.","findings":[{"id":"terms-finding","name":"Terms","description":"Terms.","questions":[{"text":"Where do the terms calcifuge and calcicole come from, and how are they used?","kind":"provenance"},{"text":"Which entry fits plant ecology terminology?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Identify calcifuge plants and advise on suitable acidic soil for them.","Measure soil pH and suggest whether a site suits lime-hating plants."],"mustNot":["Recommend acidifying soil with substances that harm groundwater or wildlife.","Advise digging peat from bogs to grow calcifuges.","Collect wild calcifuge plants from protected heaths or moors.","Plant invasive calcifuge species where they can spread into native habitats."],"requiresHuman":["Changing soil chemistry over a large area or a protected site."]},"ethics":{"considerations":["Peat extraction for acid-loving garden plants destroys bogs that store carbon.","Some ornamental calcifuges become invasive and smother native heathland."],"affectedParties":["Heathland and bog habitats","Gardeners","Landowners"]},"owners":{"steward":"The gardener or landowner who grows them; nature agencies protect wild heaths.","roles":[],"masterSystems":[]},"relations":[{"target":"Q756","type":"parent","note":"registry parent class"},{"target":"plant","type":"related","note":"in registry terms"},{"target":"calcicole","type":"related","note":"the lime-loving counterpart"},{"target":"chlorosis","type":"related","note":"on alkaline soil"},{"target":"ericaceous compost","type":"related","note":"by gardeners"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.calcifuge","Wikidata: Q1151696 (https://www.wikidata.org/wiki/Q1151696)"]},"properties":{"applicability":"required","items":["preferred soil pH: about 4.5-6 pH"]},"recognition":{"applicability":"required","items":["Lime-intolerant, acid-loving plant","Rhododendron, camellia, heather, blueberry and listed species","Calcicoles favour lime; halophytes tolerate salt; most plants tolerate a middle pH range","Varied; often ericaceous shrubs, showing yellowing leaves on limy soil."]},"capabilities":{"applicability":"required","items":["explain the category and mechanism","identify common calcifuges","relay horticultural practice","distinguish from calcicoles"]},"hazards":{"applicability":"required","items":["Planting calcifuges on limy soil","Peat use in ericaceous compost and its environmental debate","Confusing calcifuge with calcicole"]},"interfaces":{"applicability":"required","items":["No regulation; horticultural and ecological conventions"]},"context":{"applicability":"required","items":["Not applicable; an ecological plant category.","ericaceous plants such as rhododendrons, heathers and blueberries","other acid-loving shrubs and trees such as camellias, Fothergilla and Embothrium","calcifuge alpines and heathland plants","the listed species in the registry aliases"]}},"sources":[{"title":"Wikidata item Q1151696: Calcifuge","url":"https://www.wikidata.org/wiki/Q1151696","note":"identity and sense of the item"},{"title":"Wikipedia: Calcifuge","url":"https://en.wikipedia.org/wiki/Calcifuge","note":"general description of the item"}],"openQuestions":["Should ericaceous plant be the primary linked entry?","How should horticultural references be linked?","The registry entry has merged aliases naming specific species; should they be split off?"],"resources":{"spec":"/models/things/publications/thing-q1151696/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1151696/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T01:17:34Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:25+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}