noun
raised seedbed
Agricultural term for a seedbed built above ground level, often used in rice cultivation or vegetable growing to improve drainage and temperature control.
稲作では、揚げ床で苗を育てることが多い。
In rice farming, seedlings are often raised on raised seedbeds.
揚げ床は水はけが良いので、根腐れを防げる。
Raised seedbeds drain well, so they can prevent root rot.
Compound of 揚げ (age, 'raising') + 床 (toko/doko, 'bed' or 'floor'). The kanji 揚げ is often used for lifting or raising something, and 床 here refers to a prepared planting area.