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Arable Farming
Cropping
Zero till may not be as environmentally friendly as we thought.
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<blockquote data-quote="SilliamWhale" data-source="post: 6917701" data-attributes="member: 1232"><p>You can also find data to express the opposite:</p><p></p><p>[URL unfurl="true"]https://ec.europa.eu/environment/integration/research/newsalert/pdf/no_tillage_systems_linked_to_reduced_soil_n2o_emissions_in_mediterranean_agroecosystems_519na3_en.pdf[/URL]</p><p></p><p></p><p>So you have to put data in its context. You won't get me denying N20 emissions will increase in poorly aerated soils. whatever the farming system and also adjusted for artificial N use.</p><p></p><p>But very often tilled soils are only aerated for a few months (or maybe even days/weeks) before going back to an unaerated state because of a lack of structure/ soil life etc. So is this taken into account?</p><p></p><p>So I would like to see the data on the season long N20 fluctuations for a crop side by side. The other thing I'm not sure on (can someone tell me?) is during the act of tillage how much Nitrous oxides could potentially be emitted in cultivation? I don't think its massive but it could be something - the N has to go somewhere after all.</p><p></p><p>N is the most complicated and least linear of all. Why do we not have a debate about nitrous oxide emissions from grassland?</p></blockquote><p></p>
[QUOTE="SilliamWhale, post: 6917701, member: 1232"] You can also find data to express the opposite: [URL unfurl="true"]https://ec.europa.eu/environment/integration/research/newsalert/pdf/no_tillage_systems_linked_to_reduced_soil_n2o_emissions_in_mediterranean_agroecosystems_519na3_en.pdf[/URL] So you have to put data in its context. You won't get me denying N20 emissions will increase in poorly aerated soils. whatever the farming system and also adjusted for artificial N use. But very often tilled soils are only aerated for a few months (or maybe even days/weeks) before going back to an unaerated state because of a lack of structure/ soil life etc. So is this taken into account? So I would like to see the data on the season long N20 fluctuations for a crop side by side. The other thing I'm not sure on (can someone tell me?) is during the act of tillage how much Nitrous oxides could potentially be emitted in cultivation? I don't think its massive but it could be something - the N has to go somewhere after all. N is the most complicated and least linear of all. Why do we not have a debate about nitrous oxide emissions from grassland? [/QUOTE]
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Zero till may not be as environmentally friendly as we thought.
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