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Regenerative Agriculture and Direct Drilling
Regen Ag General Discussion
Is ploughing bad ?
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<blockquote data-quote="PSQ" data-source="post: 7855495" data-attributes="member: 11374"><p>Sorry, I'm not buying the claim that cultivated soils lose more CO2 per year than they produce in straw, and almost as much as they produce in grain. I'm calling 'bulls**t!' on that one.</p><p></p><p>This is my 26th season 'making the decisions' here, and I've seen soil OM levels go from a range measuring in the high 4's and low 5's%, to high 5's and low 6's%. We're not losing carbon, we're gaining. And given that theres just shy of 2000t of topsoil to the acre*, 1% is just short of 20t of OM added.</p><p>[* - bulk density 1600kg/m2, top soil worked to 30cm, mix of ploughing and non inversion, straw retained].</p><p></p><p>The difference between the plough based systems and the DD zealots is where you're measuring the OM. Plough based is mixing it through the plough layer, DD is measuring it to what? 2"? It's the same carbon, just that DD gets to call the higher surface concentration a 'miraculous' 5% rise <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite59" alt=":facepalm:" title="Facepalm :facepalm:" loading="lazy" data-shortname=":facepalm:" /></p><p>Still no comments from the DD guys about what it actually says in the KV report, that DD is worse than ploughing for soil base emissions. Here it is again:</p><p></p><p><strong>Humus and Ploughing</strong></p><p><strong></strong></p><p><strong>The soil humus content needs to be preserved. When evaluating the impact on the humus content of different crop establishment systems, the results are clear: non tillage and reduced tillage techniques do not have any positive effect on humus establishment.</strong></p><p><strong></strong></p><p><strong>In more than 100 field studies conducted in Germany, analysing the entire soil profile, the Thünen Institute concluded: crop establishment systems without tillage result in a far lower storage of carbon per ha and year. In many studies, there was even a loss of humus.</strong></p><p><strong>Source: Thünen Report Nr. 64, November 2018, page 194ff</strong></p><p><strong></strong></p><p><strong>An explanation is given by Dr. Axel Don, Thünen Institute: “Humus derives from root and crop residues as well as from organic fertilisers such as manure and slurry. It enters the soil mainly from top. Without the reversal tillage with a plough, the newly formed humus remains close to the surface and is not mixed into the topsoil evenly. And there is an additional negative effect: without loosening the soil, there is a likelihood for increased microbial nitrate decomposition and higher nitrous oxide emissions (N20) . This gas is 300 times more harmful to the climate than CO2.”</strong></p><p><strong></strong></p><p><strong>Similar results and conclusions are also showed in a pan European study called “Catch C Project”</strong></p></blockquote><p></p>
[QUOTE="PSQ, post: 7855495, member: 11374"] Sorry, I'm not buying the claim that cultivated soils lose more CO2 per year than they produce in straw, and almost as much as they produce in grain. I'm calling 'bulls**t!' on that one. This is my 26th season 'making the decisions' here, and I've seen soil OM levels go from a range measuring in the high 4's and low 5's%, to high 5's and low 6's%. We're not losing carbon, we're gaining. And given that theres just shy of 2000t of topsoil to the acre*, 1% is just short of 20t of OM added. [* - bulk density 1600kg/m2, top soil worked to 30cm, mix of ploughing and non inversion, straw retained]. The difference between the plough based systems and the DD zealots is where you're measuring the OM. Plough based is mixing it through the plough layer, DD is measuring it to what? 2"? It's the same carbon, just that DD gets to call the higher surface concentration a 'miraculous' 5% rise :facepalm: Still no comments from the DD guys about what it actually says in the KV report, that DD is worse than ploughing for soil base emissions. Here it is again: [B]Humus and Ploughing The soil humus content needs to be preserved. When evaluating the impact on the humus content of different crop establishment systems, the results are clear: non tillage and reduced tillage techniques do not have any positive effect on humus establishment. In more than 100 field studies conducted in Germany, analysing the entire soil profile, the Thünen Institute concluded: crop establishment systems without tillage result in a far lower storage of carbon per ha and year. In many studies, there was even a loss of humus. Source: Thünen Report Nr. 64, November 2018, page 194ff An explanation is given by Dr. Axel Don, Thünen Institute: “Humus derives from root and crop residues as well as from organic fertilisers such as manure and slurry. It enters the soil mainly from top. Without the reversal tillage with a plough, the newly formed humus remains close to the surface and is not mixed into the topsoil evenly. And there is an additional negative effect: without loosening the soil, there is a likelihood for increased microbial nitrate decomposition and higher nitrous oxide emissions (N20) . This gas is 300 times more harmful to the climate than CO2.” Similar results and conclusions are also showed in a pan European study called “Catch C Project”[/B] [/QUOTE]
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Is ploughing bad ?
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