谷物单产2019

Cereal yield, measured as kilograms per hectare of harvested land, includes wheat, rice, maize, barley, oats, rye, millet, sorghum, buckwheat, and mixed grains. Production data on cereals relate to crops harvested for dry grain only. Cereal crops harvested for hay or harvested green for food, feed, or silage and those used for grazing are excluded. The FAO allocates production data to the calendar year in which the bulk of the harvest took place. Most of a crop harvested near the end of a year will be used in the following year.

{
  "id": "AG.YLD.CREL.KG",
  "name": "Cereal yield (kg per hectare)",
  "unit": "",
  "source": {
    "id": "2",
    "value": "World Development Indicators"
  },
  "sourceNote": "Cereal yield, measured as kilograms per hectare of harvested land, includes wheat, rice, maize, barley, oats, rye, millet, sorghum, buckwheat, and mixed grains. Production data on cereals relate to crops harvested for dry grain only. Cereal crops harvested for hay or harvested green for food, feed, or silage and those used for grazing are excluded. The FAO allocates production data to the calendar year in which the bulk of the harvest took place. Most of a crop harvested near the end of a year will be used in the following year.",
  "sourceOrganization": "FAO electronic files and web site, Food and Agriculture Organization of the United Nations (FAO), uri: https://www.fao.org/faostat/en/#data/QCL, publisher: Food and Agriculture Organization of the United Nations (FAO)",
  "topics": [
    {
      "id": "1",
      "value": "Agriculture & Rural Development  "
    },
    {
      "id": "19",
      "value": "Climate Change"
    }
  ]
}