This example displays a stacked bar chart of soil conditions across different crop groups, with connecting lines and percentage labels between adjacent bars to highlight changes in total values. The chart uses D3.js v6, leveraging `d3.csv` to load external data, `d3.stack()` for stacking series, and `d3.scaleBand`/`d3.scaleLinear` for axes. Custom SVG line and text elements are appended to visualize deltas between group totals, with text anchored dynamically based on whether values increase or decrease.