This chart visualizes barley yield data across multiple varieties and experimental sites for the years 1931 and 1932. Each line represents a variety, with the x-axis mapping the six locations and the y-axis representing yield. The line chart is rendered using SVG within a D3 v4 framework, sourced from a TSV file containing yield measurements across 10 barley varieties at 6 sites over 2 years. The visualization uses a multi-line layout to show how each variety's yield varies across locations, with the data parsed and plotted from the tab-separated values in barley.tsv. The lines are drawn without fill, keeping the chart clean and focused on the trend comparisons between varieties across sites.