A radial tree visualization displays a hierarchical dataset of agricultural processes, from preplanting through storage and processing, with linked leaf nodes representing specific data items. The D3 v4 code uses `d3.stratify` and `d3.cluster` to compute the radial layout, rendering curved links via SVG paths and placing labeled nodes with circles. Interaction includes panning and zooming through `d3.zoom`. The visualization adapts Curran Kelleher’s world countries hierarchy block, using CSV data with pipe-delimited IDs to define parent-child relationships.