Why isn’t land depreciated?

According to international accounting stander 16 land should not be depreciated because it has no use full life

You cannot depreciate the cost of land because land does not wear out, become obsolete, or get used up.
The cost of land generally includes the cost of clearing, grading, planting, and landscaping.
Although you cannot depreciate land, you can depreciate certain land preparation costs, such as landscaping costs, incurred in preparing land for business use.
These costs must be so closely associated with other depreciable property that you can determine a life for them along with the life of the associated property.
You can depreciate most types of tangible property (except land), such as buildings, machinery, vehicles, furniture, and equipment.
You also can depreciate certain intangible property, such as patents, copyrights, and computer software.

To calculate depreciation you need to have a useful life value.
Think about it this way, if you buy a car for 10,000 its value in 5 years will go down and in 10 years it might not be able to serve your needs, this is why it is depreciated.
However, if you buy land and use it, it will serve you for an indefinite amount of time.

Because land not obsolete so it do not depreciated.

1st look at this definition of depreciation, Depreciation is the measure of the cost or revalued amount of the economic beneifts of the tangible fixed asset that have been consumed during the period.
Consumption includes the wearing out, using up or other reduction in the useful life of a tangible fixed asset whether arising from use, effluxion of time or obsolescence through either changes in technology or demand for the goods and services produced by the asset.
to get the answer why land does not depreciate worth looking at the following questions1.
can part of the land be consumed(by using it) over a time of period? i.e.
does land wear out? does it become obsolete? one has to look from these perspectives to understand why land does not depreciate.

Land generally does not depreciate in value because it is a limited resource with an infinite life and can be used for a range of purposes.

 

All assets wear out and eventually cease to exist, except land. Land is not considered to ever be able to be destroyed, so it can’t lose value and go down to zero value like other assets.

Because its included in natural resources and natural resources don't have any useful life.
i-e you can't depreciate land.