{"query": "Fertilizer - fixing nitrogen", "count": 20, "results": [{"id": "card_agriculture_fertilizer", "title": "Fertilizer - fixing nitrogen", "shelf": "codex", "surface": "secular", "snippet": "Haber-Bosch makes ammonia (sealed), the synthetic nitrogen that feeds roughly half the world. Rests on chemistry.", "authority_tier": "engine_derived", "source": "Narrow Highway — agriculture", "readable": false, "generated": false}, {"id": "card_floor_agriculture", "title": "Agriculture — soil, sun, and chemistry into food", "shelf": "codex", "surface": "secular", "snippet": "Crops fix carbon by photosynthesis (glucose) and need fixed nitrogen (Haber-Bosch ammonia, feeding half the world). Pillars rest on biology (the crop), chemistry (fertilizer and photosynthesis) and ec", "authority_tier": "engine_derived", "source": "Narrow Highway — agriculture", "readable": false, "generated": false}, {"id": "card_span_1d6f1bb2c463", "title": "DolizodbyGoOgle", "shelf": "sources", "surface": "secular", "snippet": "SUCCESS IN MARKET GARDENING \nwhere are grown several crops in a single season, \nmaintaining a constant drain upon the nourish- \nment afforded by the soil, such a plan would not \nbe found to work well.", "authority_tier": "primary_pd", "source": "Success in Market Gardening (Rawson, 1910)", "readable": true, "generated": false}, {"id": "card_survival_compost", "title": "Building soil with compost", "shelf": "survival", "surface": "secular", "snippet": "Compost turns scraps into free fertility. Layer 'greens' (kitchen scraps, fresh grass, manure — nitrogen) with more 'browns' (dry leaves, straw, cardboard — carbon), keep it as damp as a wrung sponge,", "authority_tier": "reference", "source": "USDA Farmers' Bulletins (public domain)", "readable": false, "generated": false}, {"id": "card_src_openstax_concepts_biology_review_questions_0f28946b", "title": "Review Questions — Concepts of Biology", "shelf": "biology", "surface": "secular", "snippet": "Review Questions\n\n2.\n\nThe first forms of life on Earth were thought to be_______.\n\nsingle-celled plants\n\nprokaryotes\n\ninsects\n\nlarge animals such as dinosaurs\n\n3.\n\nThe first organisms that oxygenated ", "authority_tier": "reference", "source": "OpenStax: Concepts of Biology (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_book_72438", "title": "Principles and practice of agricultural analysis. Volume 2 (of 3), Fertilizers — Harvey Washington Wiley", "shelf": "gutenberg", "surface": "secular", "snippet": "Principles and practice of agricultural analysis. Volume 2 (of 3), Fertilizers, by Harvey Washington Wiley. Subjects: Soils; Agricultural chemistry; Fertilizers; Farm produce. Read the full text (publ", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}, {"id": "card_src_book_26142", "title": "Peat and its Uses as Fertilizer and Fuel — Samuel W. (Samuel William) Johnson", "shelf": "gutenberg", "surface": "secular", "snippet": "Peat and its Uses as Fertilizer and Fuel, by Samuel W. (Samuel William) Johnson. Subjects: Peat; Fuel; Fertilizers. Read the full text (public domain): https://www.gutenberg.org/ebooks/26142", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}, {"id": "card_src_pron_fertilizers", "title": "fertilizers", "shelf": "pronunciation", "surface": "secular", "snippet": "fertilizers: pronounced (ARPABET) F ER1 T AH0 L AY2 Z ER0 Z. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_pron_fertilizer", "title": "fertilizer", "shelf": "pronunciation", "surface": "secular", "snippet": "fertilizer: pronounced (ARPABET) F ER1 T AH0 L AY2 Z ER0. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_book_69910", "title": "The cranberry — Bradley Fertilizer Company", "shelf": "gutenberg", "surface": "secular", "snippet": "The cranberry, by Bradley Fertilizer Company. Subjects: Cranberries. Read the full text (public domain): https://www.gutenberg.org/ebooks/69910", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "readable": true, "generated": false}, {"id": "card_src_word_calcium_nitrate", "title": "calcium nitrate", "shelf": "dictionary", "surface": "secular", "snippet": "calcium nitrate: (noun) a deliquescent salt that is soluble in water; sometimes used as a source of nitrogen in fertilizers", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_ammonium_carbamate", "title": "ammonium carbamate", "shelf": "dictionary", "surface": "secular", "snippet": "ammonium carbamate: (noun) a salt of carbamic acid that is used as a nitrogen fertilizer", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_calcium_cyanamide", "title": "calcium-cyanamide", "shelf": "dictionary", "surface": "secular", "snippet": "calcium-cyanamide: (noun) a compound used as a fertilizer and as a source of nitrogen compounds — syn: cyanamide", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_fertiliser", "title": "fertiliser", "shelf": "dictionary", "surface": "secular", "snippet": "fertiliser: (noun) any substance such as manure or a mixture of nitrates used to make soil more fertile — syn: fertilizer, plant food", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_theory_haber_bosch", "title": "Haber–Bosch nitrogen fixation (bread from air)", "shelf": "theories", "surface": "secular", "snippet": "Haber–Bosch nitrogen fixation (bread from air) — an engine domain that can touch it: chemistry. Calibration: seals — stoichiometry, yield and equilibrium shifts compute. N₂ + 3H₂ ⇌ 2NH₃, run at roughl", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_law_of_the_minimum", "title": "Liebig's law of the minimum (what actually limits growth)", "shelf": "theories", "surface": "secular", "snippet": "Liebig's law of the minimum (what actually limits growth) — an engine domain that can touch it: soil_science. Calibration: seals — nutrient ratios and deficiency thresholds compute. Growth is limited ", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_nutrient_cycling_agronomy", "title": "Nutrient cycling & agronomy (NPK, evapotranspiration)", "shelf": "theories", "surface": "secular", "snippet": "Nutrient cycling & agronomy (NPK, evapotranspiration) — an engine domain that can touch it: soil_science. Calibration: seals — nutrient budgets and ET rates compute. Elements cycle between soil, plant", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_green_revolution", "title": "The Green Revolution (Borlaug, semi-dwarf breeding)", "shelf": "theories", "surface": "secular", "snippet": "The Green Revolution (Borlaug, semi-dwarf breeding) — an engine domain that can touch it: agriculture. Calibration: map-only — yields are historical measurements, not a sealable computation. Norman Bo", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_src_word_organic_fertiliser", "title": "organic fertiliser", "shelf": "dictionary", "surface": "secular", "snippet": "organic fertiliser: (noun) a fertilizer that is derived from animal or vegetable matter — syn: organic, organic fertilizer", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_etym_fertilize", "title": "fertilize", "shelf": "etymology", "surface": "secular", "snippet": "fertilize: etymology (Webster 1913) — v. t.: [Cf. F. fertiliser.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}], "house": {"door": "FIND", "kind": "cards", "trail": "results", "seal": null, "next_step": {"do": "open the top card", "door": "FIND", "tool": "card_get", "params": {"id": "card_agriculture_fertilizer"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}