This stacked bar chart visualizes barley crop yields across multiple varieties, with each bar segmented by the site where the crop was grown. The visualization uses Vega-Lite’s declarative specification to encode variety on the x-axis, aggregated yield on the y-axis, and site as the color channel. Data is loaded from a local JSON file containing individual yield measurements, and the resulting chart is rendered as an SVG. The stacked segments communicate the total yield per variety while also comparing contributions from different agricultural research sites.