“ What it takes to amend the soil http://www.soiltesting.okstate.edu/extn_pub/f-2226web.pdf I was wondering options are for removing salt from soil... (read full comment) ” 

Posted on July 8, 2010 at 5:52 PM EDT

“ EROEI "By the barrel, algae fuel provides three to four units of energy for every unit used to make it--a ratio that approaches petroleum's 5-to-1... (read full comment) ” 

Posted on July 22, 2009 at 8:17 AM EDT

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