Arable crops; production, to region 1994-2023

Tabeltoelichting

Toelichting onderwerpen

Area under cultivation

Area of cultivated land in use for growing crops.

Harvested area

At the preliminary harvest estimates this area is in principle equal to
the area under cultivation. However based on information from experts on
expected crop failure it is possible to make an estimate of the area that
probably will not be harvested. When this is the case the harvested area
is smaller than the cultivated area.
Definite figures are based on already harvested areas and areas expected
to be harvested later on. This is the area on which production
has taken place effectively. Due to circumstances (for example flooding)
this (surface) area can be smaller than the original (surface) area used
for cultivation.

Gross yield per ha

In determining the yield per hectare (the average yield figure) only the
hectares which are effectively harvested or will be harvested are
counted. Hectares of which the harvest is lost (for example due to
flooding) are not counted.
The yields of grain corn and corn cob mix have been calculated in the
situation in which these harvested crops contain a humidity of 35 percent.
Green maize is calculated at a moisture content of 65 percent.
In the preliminary estimate the yield of cereals (wheat, barley, oats, rye
and triticale) are defined as the gross weight of the harvested grains.
The definite estimate is the weight in the situation where each grain
would contain 16 percent moisture.
Explanation:
Cereal with 16 percent moisture (or less) is so dry that it can be
stored without problems. More moisture would mean that the grain first has
to be dried, before it can be stored. Drying the crop costs money, the
companies therefore prefer harvesting by 16 percent moisture content.
But this does not always work; in reality, the grain contains more water.
However, in order to get a good estimate of the actual 'dry' yield
all individual statements of the yields per hectare (from which the actual
moisture content is known) are recalculated to the situation with 16
percent moisture.

Gross yield, total

The total yield (total gross production) includes the whole area which
has been harvested or still will be harvested. The total yield also
includes the part of production that for some reason is unsuitable for
its original purpose. This only applies if the crop can still be used for
other purposes (for example, potatoes which can only be used for animal
feed). This is the reason why the gross yield does not equal the
commercial production.
The yields of grain corn and corn cob mix have been calculated as the
harvested crops contain 35 percent moisture. Green maize is calculated at
a moisture content of 65 percent.
In the preliminary estimate, the yield of cereals (wheat, barley, oats,
rye and triticale) is defined as the gross weight of the harvested grains.
The definite estimate is the weight in the situation where each grain
contains 16 percent moisture.
Explanation:
Cereal with 16 percent moisture (or less) is so dry that it can be
stored without problems. More moisture would mean that the grain first has
to be dried, before it can be stored. Drying the crop costs money, the
companies therefore prefer harvesting by 16 percent moisture content.
But this does not always work; in reality, the grain contains more water.
However, in order to get a good estimate of the actual 'dry' yield
all individual statements of the yields per hectare (from which the actual
moisture content is known) are recalculated to the situation with 16
percent moisture.