Stages pre-emergent would be stages before the emergence of seedling soil. post-emergence stagens would be after the emergence of seedling soil,

Events of physiological germination. Ie before radicle protrusion reaches 1 or 2 mm, after this we consider as pos-germination stages.

Pre-emergence is when the seed has germinated but has still not come out from under the soil surface.

Post-emergence is when the seed germinates and grows and comes out from under the soil surface

pre-emergence growth occurring in the dark

pre emergence stage : is an heterotrophic growth of seedling in the dark befor the seedling shoot leads the seedlings outside of the soil.

post emergence; is an autotrophic growth after the emergence of seedling apex from the soil