nitrogen fixation
Every article and hero in Arborpedia that touches this subject.
№ 001TreesAcacia: The Thorn Trees That Hold the Drylands
Nitrogen-fixing dryland keystones, the ant partnerships and chemical defences, and the reverse-phenology tree that fertilises crops beneath it.
Jul 2026Read →
№ 047TreesBlack Locust: Rot-Proof Timber, Nitrogen, and a Bad Reputation
A nitrogen-fixing tree with fence posts that outlast concrete — and one of the most aggressively invasive trees in Europe.
Jul 2026Read →
№ 107GrowingCover Cropping: Green Manures That Build Soil
How sowing clover, vetch, rye, and other cover crops between seasons fixes nitrogen, prevents erosion, suppresses weeds, and feeds the soil food web.
Nov 2025Read →
№ 264TreesLeucaena and Gliricidia: The Fertiliser Trees You Cut Back
Fast nitrogen-fixing trees cut repeatedly for green manure and fodder — plus the mimosine that limits one and the versatility that spread the other.
Jul 2026Read →
№ 315WildlifeNitrogen-Fixing Bacteria: Free Fertiliser in Every Root
How Rhizobium, Frankia, and free-living bacteria pull atmospheric nitrogen into the living world and feed every productive ecosystem.
Nov 2025Read →
№ 317TreesNitrogen-Fixing Shrubs: The Frankia Partnership
Sea buckthorn, goumi, Siberian pea, and their kin. Shrubs that host Frankia bacteria and pull 70 to 180 kg of nitrogen per hectare out of thin air.
Jun 2026Read →
№ 314RestorationNitrogen-Fixing Trees: Free Fertility Forever
Trees partnered with soil bacteria pull nitrogen from the air, feeding degraded soils and whole guilds without a bag of fertiliser.
Oct 2025Read →
№ 346CropsPeas and Beans: The Crops That Pay Rent
Legumes that fix their own nitrogen, why you cut the tops and leave the roots, and the difference between broad, French, and runner beans.
Jul 2026Read →
№ 415TreesSea Buckthorn: Nitrogen, Salt, and Sand
A nitrogen-fixing pioneer that stabilises dunes, tolerates salt spray, and carries one of the highest vitamin C loads of any temperate fruit.
Jul 2026Read →
№ 432TreesSilk Tree: Powderpuff Flowers and Folding Leaves
A nitrogen-fixing ornamental legume with silky pink flowers and leaves that fold shut at night — beautiful, short-lived, and invasive in warm climates.
Jul 2026Read →