Earthworms enhanced winter oilseed rape (Brassica napus L.) growth and nitrogen uptake

▶ Earthworm activities significantly increased the dry weight of winter oilseed rape before winter. ▶ Earthworm activities significantly increased N contents of winter oilseed rape before winter. ▶ Increasing soil mineral N concentration and altering the physiological processes might be responsible for earthworm activities increased winter oilseed rape growth.