◎ 菜枯 càikū
[dregs of rapeseeds after being extracted] 油菜子榨油后剩下的压成饼状的渣滓,可用做肥料

1.cake-shaped rape seed dregs (as fertilizer)

油菜子经榨油后压成的饼状渣滓，是一种很好的肥料。