मृत्काष्ठकोष्ठाः स्नेहस्य पृथिवी लवणस्य च ॥ कZ_०२.१५.६४च्द् ॥
mṛt-kāṣṭha-koṣṭhāḥ snehasya pṛthivī lavaṇasya ca
स्नेहस्य मृत्-काष्ठ-कोष्ठाः; लवणस्य च पृथिवी (निक्षेपः) ।
Because preservation depends on material compatibility: oils keep better in suitable containers, while salt is stabilized by dry ground storage.