On which day of creation were soil bacteria said to be created?

Soil bacteria are typically associated with the creation of land and plant life, which occurs on the third day of creation in the biblical narrative. During this day, God is described as gathering the waters together to let dry land appear, and subsequently, vegetation is created, which includes plants and grasses.

Soil bacteria play a crucial role in the health of ecosystems, particularly in the soil's nutrient cycling and supporting plant growth. Their development is linked to the formation of soil that arises from the land being created, making it logical to place their creation on the third day when the foundational elements for such life were established. The linkage between vegetation and microorganisms like bacteria is essential for healthy ecosystems, and thus, associating soil bacteria with the creation of land and plants underscores their role in the biosphere.