It can be true that not using artificial fertilisers, biocides,GM crops etc., will sometimes reduce yields in the short term. Nevertheless, such commercial boosts are not sustainable.
These extra inputs yield less over time,and are becoming more expensive themselves.
Much better to work with systems which don't degrade, and produce higher quality food with far less environmental harm.
We bin more food than your suggested 20% defecit.
I have produced more and better food off my 170 acre Orkney farm in the last 12 years since becoming Organic than I did using more conventional methods.
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