Summary of results (% of cumulative emergence, persistence index and weight of 1000 seeds) for 30 rare arable plants during three consecutive years (first and second years of burial [means of seasons S1 and S2]; third year of burial [S1 only]).

<p>Percentages represent the yearly emergence irrespective of burial treatment. In the last column species are classified according to the presence of secondary dormancy: no, low or high.