You have a good point here Raymond, I shall do a careful taste test of those onions. But larger size does not necessariy bring a depletion of nutrients and I feel that one can assess quality by looking at the general health and vigour of growth, including the colour and sheen of leaves.
I notice on my dig/no dig experiment that keaves in the dug bed sometimes look dull and less ‘alive’, even though each bed has the same ingredients, so there is also the question of vital energies in food.
