"fallow crop" meaning in English

{
  "forms": [
    {
      "form": "fallow crops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fallow crop (plural fallow crops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Agriculture",
          "orig": "en:Agriculture",
          "parents": [
            "Applied sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The crop taken from a green fallow field."
      ],
      "id": "en-fallow_crop-en-noun-Uh689NeU",
      "links": [
        [
          "agriculture",
          "agriculture"
        ],
        [
          "crop",
          "crop"
        ],
        [
          "green fallow",
          "green fallow"
        ]
      ],
      "raw_glosses": [
        "(agriculture)The crop taken from a green fallow field."
      ],
      "related": [
        {
          "word": "fallow"
        }
      ],
      "topics": [
        "agriculture",
        "business",
        "lifestyle"
      ]
    }
  ],
  "word": "fallow crop"
}

{
  "forms": [
    {
      "form": "fallow crops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fallow crop (plural fallow crops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "fallow"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Agriculture"
      ],
      "glosses": [
        "The crop taken from a green fallow field."
      ],
      "links": [
        [
          "agriculture",
          "agriculture"
        ],
        [
          "crop",
          "crop"
        ],
        [
          "green fallow",
          "green fallow"
        ]
      ],
      "raw_glosses": [
        "(agriculture)The crop taken from a green fallow field."
      ],
      "topics": [
        "agriculture",
        "business",
        "lifestyle"
      ]
    }
  ],
  "word": "fallow crop"
}