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As news of weed killer resistant plants hits the headlines, Patrick Holden reflects on discussions at the latest Oxford Real Farming Conference, highlighting why the plough may not be the worst option when it comes to nature-friendly cultivation. The theme was how ploughing and cultivation can be good for soil health.
But will the current trend away from ploughing towards direct drilling and the accompanying use of glyphosate bring the benefits advocates claim, or could this make matters even worse? Richard Young follows on from his article, Speed the plough or the direct drill and sprayer?
This is critical distinction as to the effect of leaving land exposed of deforestation of overgrazing and the use of the plough and industrialised chemical farming has alter vast amounts of the earths land surface, as the amount of heat reradiated from the surface is = to the surface temperature to the power of 4!
The bulletin says, “Iowa State University researchers generally recommend terminating the cover crop with herbicide 10-14 days prior to planting corn to protect yield; however, that time frame is less critical for soybeans.” The type of herbicide depends on which cover crop is used and the timing for spring planting.
Instead, deep ploughing to create intensive cropland tore up the native grass cover, leaving soils exposed and friable. The disaster , which left over 500,000 Americans homeless, intensified the Great Depression and devastated the region’s ecology.
Using data from Canadian arable farms, Bain’s consultants showed yield loss was typical in the first two seasons of transforming to regenerative agriculture. If all the money put into food technology right now were instead ploughed into regenerative agriculture, investors would be “heroes for the planet,” adds Terry at GoodSam.
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