In mathematics|lang=en terms the difference between approximation and mollifier

is that approximation is (mathematics) an imprecise solution or result that is adequate for a defined purpose while mollifier is (mathematics) an "approximation to the identity", a smooth function with special properties, used in distribution theory to create sequences of smooth functions approximating nonsmooth (generalized) functions, via convolution.

As nouns the difference between approximation and mollifier

is that approximation is the act, process or result of approximating while mollifier is (mathematics) an "approximation to the identity", a smooth function with special properties, used in distribution theory to create sequences of smooth functions approximating nonsmooth (generalized) functions, via convolution.

As an adjective fertile

is (of land etc) capable of growing abundant crops; productive.

As a noun chernozem is

a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

As nouns the difference between soil and chernozem

is that soil is (uncountable) a mixture of sand and organic material, used to support plant growth or soil can be (uncountable|euphemistic) faeces or urine etc when found on clothes or soil can be a wet or marshy place in which a boar or other such game seeks refuge when hunted while chernozem is a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

As a verb soil

is to make dirty or soil can be to feed, as cattle or horses, in the barn or an enclosure, with fresh grass or green food cut for them, instead of sending them out to pasture; hence (such food having the effect of purging them), to purge by feeding on green food.

As nouns the difference between humus and chernozem

is that humus is while chernozem is a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

As a proper noun phosphorus

is a name sometimes used for hesperus, the personification in greek mythology of the planet venus.

As a noun chernozem is

a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

As nouns the difference between ammonia and chernozem

is that ammonia is (inorganic compound) a gaseous compound of hydrogen and nitrogen, nh₃, with a pungent smell and taste while chernozem is a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

Chernozem is a derived term of chernozemic.

As an adjective chernozemic

is being or containing chernozem.

As a noun chernozem is

a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

Greyzem is a see also of chernozem.

As a noun chernozem is

a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

As nouns the difference between kastanozem and chernozem

is that kastanozem is a kind of soil, brighter than chernozem and related to the mollisols, that is rich in humus and originally covered with early maturing native grassland vegetation, which produces a characteristic brown surface layer while chernozem is a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.

Phaeozem is a see also of chernozem.

As a noun chernozem is

a fertile black soil containing a very high percentage of humus (3% to 15%) and high percentages of phosphoric acids, phosphorus and ammonia.