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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.

                - 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).



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