tag:blogger.com,1999:blog-31006871.post-63547002897890908352008-05-06T10:01:00.000+02:002008-05-06T10:01:00.000+02:002008-05-06T10:01:00.000+02:00@Pieter<BR/><BR/>Just a quick off the bat thought on this...<BR/><BR/>Soil depletion is closely linked to farming methods. With the <A HRE="http://en.wikipedia.org/wiki/Green_Revolution">Green Revolution</A> there has been a wide scale move towards synthetic fertilisers (the typical NPK combos).<BR/><BR/>There are other techniques though, such as <A HREF="http://en.wikipedia.org/wiki/Organic_farming" REL="nofollow">organic farming</A>, <A HREF="http://en.wikipedia.org/wiki/No_till" REL="nofollow">no till</A>, and <A HREF="http://en.wikipedia.org/wiki/No_dig" REL="nofollow">on dig</A>. Also read about how to make a <A HREF="http://www.no-dig-vegetablegarden.com/" REL="nofollow">no dig vegetable garden</A>.<BR/><BR/>There are definitely socio-economic-political issues that also need addressing. I have a friend who always <A HREF="http://www.theforumsa.co.za/forums/showthread.php?p=13240#post13240" REL="nofollow">raises that point</A>.<BR/><BR/>I don't know what our planet can sustain - I think that is a part of what we are currently trying to figure out.Duncan Drennanhttp://blog.engineersimplicity.com/noreply@blogger.com