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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?
Each gram of humus can hold twenty times its own weight of water, allowing soil with high organic matter to act as a sponge to soak up heavy rain and continue to provide moisture for crops during dry conditions. Most cropland globally has lost 30-40% of its organic matter. Image available here under a Creative Commons license.
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