Sure it harvests energy from the sun. The question is whether it harvests enough energy to cover the inputs and the inherent losses in the system. Again, I suspect that the answer to that is NO.
What kind of corn crop would you get if you went year on year with corn without adding significant amounts of manmade nitrogen? That 175 bu crop would be down to 100, then 75, then 50 and probably decline from there fairly rapidly. I don't imagine there's anyone out there with much interest in proving that... They wouldn't make any money proving that, so they add chemical N.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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