Posted: 15/07/2014 at 15:31
Yes, but seedlings need the tap roots both for anchorage and for feeding. The hair like roots come from those tap roots and take in water and nutrients, so if you damage a tap root the seedling suffers. Odd.
Having said that there are a fair number of plants which definitely increase the number of roots when there is damage to the ones they have. That is why we can pot on seedlings without them dropping dead because the roots have been damaged.
That, though, applies to fibrous roots rather than tap roots.
Would like to hear from someone who has actually followed the advice given.