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<blockquote data-quote="Two Tone" data-source="post: 5879270" data-attributes="member: 44728"><p>I see your point. But:</p><p></p><p>Yara definitely say "the grain fixes 12 800 kg / ha of CO2"</p><p></p><p>Regarding the CO2 in the residue, here is another question that will make you think:</p><p>If it was ploughed into the soil, might that trapped residue mitigate some, if not all of the CO2 that is released by the soil when it is ploughed?</p><p></p><p>In other words, is the residue prevented from releasing its CO2 by being buried and stored? Of course, the CO2 that is in the buried residue probably isn't recycled into the next crop. However, other Nutrients, including Nitrogen that can be recycled into the following crop are. But surely that CO2 is <em>more</em> captured than if it was left of the soil surface to rot and release to the air. And wouldn't some of that Nitrogen be released as Ammonia, which is far worse`?</p><p></p><p>I don't know the answers. But I can't find any work on this. I think it ought to be done.</p><p></p><p>What I am trying to discover is the truth behind the facts that we are fed about CO2 damage <u>or not</u>, that using Nitrogen fertilisers creates.</p><p></p><p>To me, this is far more important than crop carbon cultivation accounting. The cultivations have to be done anyway and even though it can be argued that No-Till methods create less CO2 in establishing a crop, the fact that using Nitrogen fertiliser very dramatically captures more CO2 than it releases could be far more relevant.</p><p></p><p>A very interesting subject though, don't you think?</p></blockquote><p></p>
[QUOTE="Two Tone, post: 5879270, member: 44728"] I see your point. But: Yara definitely say "the grain fixes 12 800 kg / ha of CO2" Regarding the CO2 in the residue, here is another question that will make you think: If it was ploughed into the soil, might that trapped residue mitigate some, if not all of the CO2 that is released by the soil when it is ploughed? In other words, is the residue prevented from releasing its CO2 by being buried and stored? Of course, the CO2 that is in the buried residue probably isn't recycled into the next crop. However, other Nutrients, including Nitrogen that can be recycled into the following crop are. But surely that CO2 is [I]more[/I] captured than if it was left of the soil surface to rot and release to the air. And wouldn't some of that Nitrogen be released as Ammonia, which is far worse`? I don't know the answers. But I can't find any work on this. I think it ought to be done. What I am trying to discover is the truth behind the facts that we are fed about CO2 damage [U]or not[/U], that using Nitrogen fertilisers creates. To me, this is far more important than crop carbon cultivation accounting. The cultivations have to be done anyway and even though it can be argued that No-Till methods create less CO2 in establishing a crop, the fact that using Nitrogen fertiliser very dramatically captures more CO2 than it releases could be far more relevant. A very interesting subject though, don't you think? [/QUOTE]
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