Page 290 - NIIÊN GIÁM THỐNG KÊ TỈNH HƯNG YÊN 2022

area, inland water surface area (stocking, settling basin, filter pond), coastal
water surface area; area of auxiliary constructions.

Annual plants are planted, harvested and finished in a production
cycle within a period of no more than 1 year, including annuals that keep the
original, including: grain food crops (rice, corn, barley, millet,...); annual
industrial crops (sugar cane, tobacco, pipe tobacco, cotton, jute, cassava...)
and other annual crops (vegetables and beans, flowers, crop for animal feed,
spices, and annual medicinal crops).

Planted area of annual crop is the area calculated when the crop has
finished the sowing period and has passed the growth and development period.

Harvested area of annual crop is the area of crops grown after the
development period, for harvesting useful products. The harvested area is
equal to the planted area minus the lost area and the area of annual crops for
products but not harvested.

Perennial plants are those planted once, grows for many years and are
harvested one or more times, including: Fruit trees (oranges, lemons,
longans, grapefruits, bananas, pineapples, durians... ); perennial industrial
crops (cashew, pepper, rubber, coffee, tea, coconut...); perennial spice and
medicinal plants; other perennial plants (cocoa, mulberry, gac, betel nut,
areca, perennial ornamental plants).

The area of perennial crop includes the area of concentrated perennial
plants and the conversion area of scattered perennial plants for products.

Productive area of perennial plants/trees is the actual area of
perennials that have completed the basic construction period and have
yielded stable products regardless of whether there are products in that year
or not; including the area of perennial plants for concentrated planting
products and and the area converted from area of scattered trees having
products to the concentrated area.

Perennial tree/plant area was calculated at the time of observation.
Yield of agricultural crops refers to the main product per one area

unit of a certain agricultural crop or group of agricultural crops actually
harvested in a production season or in a year on average planted area.

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