{
  "summary": "The United States tariff has 29 national lines in HS chapter 31 (fertilisers), under 24 subheadings in 5 headings.",
  "updatedAt": "2026-10-09",
  "facts": [
    {
      "label": "National lines",
      "value": "29",
      "source": null
    },
    {
      "label": "Subheadings",
      "value": "24",
      "source": null
    },
    {
      "label": "Tariff",
      "value": "United States",
      "source": "https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false",
      "url": "https://border.bot/countries/united-states"
    },
    {
      "label": "Chapter",
      "value": "31: Fertilisers",
      "source": null
    }
  ],
  "faq": [
    {
      "question": "How many national tariff lines does the United States tariff have in HS chapter 31?",
      "answer": "The United States tariff has 29 national lines in HS chapter 31 (fertilisers), under 24 subheadings in 5 headings."
    }
  ],
  "sections": [
    {
      "id": "covers",
      "title": "Subheadings with United States lines",
      "text": [
        "The United States tariff has 29 national lines in HS chapter 31 (fertilisers), under 24 subheadings in 5 headings."
      ]
    },
    {
      "id": "other-countries",
      "title": "In other countries",
      "text": [
        "No other national tariff on border.bot has live lines under chapter 31 yet."
      ]
    },
    {
      "id": "sources",
      "title": "Sources and updates",
      "text": [
        "The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.",
        "This page was last updated on 9 October 2026.",
        "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling."
      ]
    }
  ],
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      "code": "US",
      "name": "United States",
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      "name": "United States",
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        "version": "2026HTSRev21",
        "liveAt": "2026-10-09T21:15:50.043Z",
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    "dateModified": "2026-10-09T21:15:58.040Z",
    "chapter": {
      "code": "31",
      "description": "Fertilisers"
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    "headings": [
      {
        "code": "3101",
        "description": "Animal or vegetable fertilisers, whether or not mixed together or chemically treated; fertilisers produced by the mixing or chemical treatment of animal or vegetable products",
        "subheadings": [
          {
            "code": "310100",
            "description": "Animal or vegetable fertilisers, whether or not mixed together or chemically treated; fertilisers produced by the mixing or chemical treatment of animal or vegetable products",
            "lines": 1
          }
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        "code": "3102",
        "description": "Mineral or chemical fertilizers, nitrogenous",
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          {
            "code": "310210",
            "description": "Urea, whether or not in aqueous solution",
            "lines": 3
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            "code": "310221",
            "description": "Ammonium sulphate; double salts and mixtures of ammonium sulphate and ammonium nitrate: Ammonium sulphate",
            "lines": 1
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            "code": "310229",
            "description": "Ammonium sulphate; double salts and mixtures of ammonium sulphate and ammonium nitrate: Other",
            "lines": 1
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            "code": "310230",
            "description": "Ammonium nitrate, whether or not in aqueous solution",
            "lines": 1
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          {
            "code": "310240",
            "description": "Mixtures of ammonium nitrate with calcium carbonate or other inorganic non-fertilising substances",
            "lines": 1
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          {
            "code": "310250",
            "description": "Sodium nitrate",
            "lines": 1
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            "code": "310260",
            "description": "Double salts and mixtures of calcium nitrate and ammonium nitrate",
            "lines": 1
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            "code": "310280",
            "description": "Mixtures of urea and ammonium nitrate in aqueous or ammoniacal solution",
            "lines": 1
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          {
            "code": "310290",
            "description": "Other, including mixtures not specified in the foregoing subheadings",
            "lines": 1
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      {
        "code": "3103",
        "description": "Mineral or chemical fertilizers, phosphatic",
        "subheadings": [
          {
            "code": "310311",
            "description": "Superphosphates: Containing by weight 35 % or more of diphosphorus pentaoxide (P2O5)",
            "lines": 1
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            "code": "310319",
            "description": "Superphosphates: Other",
            "lines": 1
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            "code": "310390",
            "description": "Other",
            "lines": 1
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        "code": "3104",
        "description": "Mineral or chemical fertilizers, potassic",
        "subheadings": [
          {
            "code": "310420",
            "description": "Potassium chloride",
            "lines": 2
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            "code": "310430",
            "description": "Potassium sulphate",
            "lines": 1
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          {
            "code": "310490",
            "description": "Other",
            "lines": 1
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      {
        "code": "3105",
        "description": "Mineral or chemical fertilizers containing two or three of the fertilizing elements nitrogen, phosphorus and potassium; other fertilizers; goods of this chapter in tablets or similar forms or in packages of a gross weight not exceeding 10 kg",
        "subheadings": [
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            "code": "310510",
            "description": "Goods of this Chapter in tablets or similar forms or in packages of a gross weight not exceeding 10kg",
            "lines": 1
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          {
            "code": "310520",
            "description": "Mineral or chemical fertilisers containing the three fertilising elements nitrogen, phosphorus and potassium",
            "lines": 1
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          {
            "code": "310530",
            "description": "Diammonium hydrogenorthophosphate (diammonium phosphate)",
            "lines": 1
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          {
            "code": "310540",
            "description": "Ammonium dihydrogenorthophosphate (monoammonium phosphate) and mixtures thereof with diammonium hydrogenorthophosphate (diammonium phosphate)",
            "lines": 2
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          {
            "code": "310551",
            "description": "Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Containing nitrates and phosphates",
            "lines": 1
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            "code": "310559",
            "description": "Other mineral or chemical fertilisers containing the two fertilising elements nitrogen and phosphorus: Other",
            "lines": 1
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            "code": "310560",
            "description": "Mineral or chemical fertilisers containing the two fertilising elements phosphorus and potassium",
            "lines": 1
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          {
            "code": "310590",
            "description": "Other",
            "lines": 2
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        ]
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    "lines": 29,
    "previous": {
      "code": "30",
      "description": "Pharmaceutical goods specified in note 4 to this chapter",
      "indexable": true
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    "next": {
      "code": "32",
      "description": "Tanning extracts of vegetable origin; tannins and their salts, ethers, esters and other derivatives",
      "indexable": true
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  "code": "31",
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  "notice": "Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.",
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