noun
dealing in unharvested rice crop
A specialized agricultural and commercial term referring to the practice of buying and selling rice while it is still growing in the field, before harvest.
青田売買は、収穫前の稲を取引する慣行です。
Aota baibai is the practice of trading rice before it is harvested.
Compound of 青田 (aota, 'green rice field') and 売買 (baibai, 'buying and selling'). The term literally describes trading rice while the field is still green.