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Ratnakarandaka-śrāvakācāra
infinite jivas, therefore, all such vegetables must not be consumed.
Jain, Vijay K. (2012), "Shri Amritachandra Suri's Purusārthasiddhyupāya", p. 105.
Jain, Champat Rai gives the following explanation:
The green roots and vegetables mentioned are forbidden on the ground that each of them is the abode of more souls than one; and butter is objectionable on account of its becoming the incubator of a certain kind of germs on a large scale within a very short time of its preparation. Jainism allows butter to be used by its followers only within an hour or so of its churning, though ghee (clarified butter) may be eaten at any time before it becomes unwholesome. The reason for this is to be found in the fact that butter becomes sterilized in the process of clarification and therefore unsuitable as a breeding ground for germs.
Jain, Champat Rai (1917), "Ratnakarnda-śrāvakāchāra (or The Householder's Dharma)”,
p. 39-40.
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