http://www.wizards.com/Magic/Magazine/Article.aspx?x=mtg/daily/boab/134
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looks good.
This is really weird. I basically had this exact deck. Everything is the same except I've got some harrow, some baloth woodcrasher, no lotus cobra, and no khalni gem. Mine works damn well. You may also want to look into bountiful harvest, cause that's helped me out a ton.
That seems like an excessive amount of land.