all of these seeds from the wheat field were dead over 2 years after burying. After 2 years, the germinability of the seeds om the wheat field was 57.0%, for Galium aparine and 80% for Veronica persica;

• 猪殃殃、波斯婆婆纳的种子在旱田中2年内的发芽率为57.；0%25、80