For rice seedlings (patient ma-) to be ready for transplanting.
Main-crop rice seedlings, inhapna', are ready when they are about 15 - 20 cm. above the water surface; second-crop seedlings, binunbun, when they are about 25 - 30 cm. above the soil surface.
binunbun, Stages of Second-crop Rice-Seedling Growth,
inhapna', Stages of Main-Crop Rice-Seedling Growth,