In landscaping and civil engineering, "spread mature" is a procedural instruction for soil restoration.

Academic papers often discuss the "ability to spread" of "mature cells".

: Mature silkworms are spread on these prepared beds (which can include paper linings) to begin spinning their cocoons. 3. Soil and Compost Management

: Research on blood platelets describes how mature megakaryocytes are allowed to spread on fibrinogen-coated surfaces to study their actin organization and skeletal dynamics.

: Researchers spread mature rice panicles onto white paper and fix them with adhesive tape to photograph them for structural and seed-count analysis using specialized software. 2. Traditional Sericulture (Silk Farming)

If you are looking for a specific titled or about this topic, the most relevant study is:

In the context of historic and traditional silk production, specialized beds are prepared for silkworms.