I carefully avoided the 'at once' bit. Clearly that would be even more infeasible.
That study / blog post is certainly partisan - but it is written by an energetic vegan (hmm, you'd think that'd be an oxymoron).
I've still yet to see a workable solution to the Nitrogen and Phosphorous (as well as all the other micronutrient and mineral) cycles that does not intrinsically require the involvement of animal husbandry or the input of massive amounts of energy.
Let me throw a reference to a properly researched study back at you - Simon Fairlie's 'Meat: A Benign Extravagance'
That study / blog post is certainly partisan - but it is written by an energetic vegan (hmm, you'd think that'd be an oxymoron).
I've still yet to see a workable solution to the Nitrogen and Phosphorous (as well as all the other micronutrient and mineral) cycles that does not intrinsically require the involvement of animal husbandry or the input of massive amounts of energy.
Let me throw a reference to a properly researched study back at you - Simon Fairlie's 'Meat: A Benign Extravagance'
http://books.google.com.au/books/about/Meat.html?id=iid8mTmX...