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- For annual crops:

Harvested production
Sown yield =
Sown area

Harvested production
Harvested yield =
Harvested area

- For perennial crops: Only productivity is calculated for areas for products
(also known as areas put into production) regardless of whether there are products
in that year or not.
Harvested production from productive area
Harvested yield =
Total productive area

Production of agricultural crops is the total volume of the main product of
a certain agricultural crop or group of agricultural crops obtained in a cropping
season or in a year of an agricultural production unit or a region/ geographical
area.

Production of each type of agricultural crops is determined by the form of the
product. For products such as rice, maize, green beans, soybeans, etc. are recorded
in the form of dry grain; sweet potatoes, potatoes, cassava are recorded in form of
fresh bulbs; tea in form of fresh buds, coffee in form of dry kernel, rubber in form
of dried latex, fruits in form of fresh fruits, etc.

Production of cereals include output of paddy, maize, and others grain crops
such as wheat, millet, kaoliang, etc. produced in a given period of time..

Production of paddy rice (also known as production of paddy in basket) is the
clean and dried paddy output of all crops in the year. The paddy output of a year is
valid for that year, excluding loss during harvest, transport, and threshing, etc.
(destroyed by mice, loss in fields, damage before storage).

Production of maize is the output of clean and dried maize harvested during
the year.

Production of starchy root crops refers to the output of cassava, sweet
potatoes, winged yam, taro, edible canna, and other starchy root crops produced in
a given period.

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