Fig. 5. Hectares of drainage systems yearly erected in the Kronoberg County 1920 to 1982. Data on drainage areas for which government grants have been given for the year they have been inspected. Before 1920 quantitative data is rare. Data displayed as yearly addition, cumulative over 30 years, and cumulative over the whole period. Source: annual reports from the Swedish Forest Agency 19061982.

Fig. 5