different between liftable vs siftable

English

lift +? -able

liftable (comparative more liftable, superlative most liftable)

sift +? -able

siftable (comparative more siftable, superlative most siftable)

Capable of being sifted.
- 1998, Nasir El Bassam, Energy plant species: their use and impact on environment and development (page 273)
  Most soils have been shown to be suitable for topinambur cultivation, though the soil should be siftable so excessively clayey soils should be avoided.

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