The two things that differentiate containers from raised beds is additional water retention in containers and the fact that roots cannot "run". If you have the continuity of a soil bridge so that water drains into the soil below the container, and enough holes that roots can run out the sides and bottom, you have nearly the same physical properties of a raised bed. Evaporative loss would probably be the biggest physical difference.

Partially burying nearly any container with large drainage holes (so roots can run) will technically create a raised bed.

Al

Makes sence. Thankyou. filix