Yes, fish food inputs are one weak point, for sure, just as are fertilizer
inputs or farm-animal feed in manure-based farming.... Feeding the animals
that provide manure, or generating permanent compost for crops, is the hidden
defect of all organic farming. John Jeavons and others have calculated that
for every acre of food production, 4 to 6 acres of compost or animal-feed
crops are needed to have a sustainable system.
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