“Algae biofuel mania”. Stockhouse. 11 June 2008 – Algae cannot fix nitrogen from the atmosphere, and so they require some form of nitrogenous fertilizer, whether synthetic or natural. That might be provided by landfill organic wastes or agricultural residues of various sorts or specially prepared nutrient compounds, but whatever the source, you’re not getting tons and tons of living biomass unless you put in tons and tons of decomposed biomass. It’s just like any other kind of farming. You get out what you put in.