The Rodale Institute did a 30 year side-by-side study [rodaleinstitute.org]. They found that,
- initially, organic farms created less, as fertilizers and pesticide initially gave a conventional farms a boost. This disappeared over time, as conventional farming damages and degrades the soil, reducing yeilds.
- organic outperforms conventional in years of drought.
- organic farming systems build rather than deplete soil organic matter, making it a more sustainable system.
- organic farming uses 45% less energy and is more efficient.
- conventional systems produce 40% more greenhouse gases.
- organic farming systems are more profitable than conventional.
I am not sure where that last one came from (I haven't read the final report [rodaleinstitute.org])
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