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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: 7855881" data-attributes="member: 11374"><p>The part of the report referred to by the OP, with the bit saying <em>DD claims are often inflated</em> <strong><u>highlighted and underlined</u></strong>:</p><p></p><p><a href="https://www.thuenen.de/media/institute/ak/Allgemein/news/Thuenen_Report_64_final.pdf" target="_blank">https://www.thuenen.de/media/institute/ak/Allgemein/news/Thuenen_Report_64_final.pdf</a></p><p></p><p>194 Results and Discussion Chapter 3</p><p>3.2.10.3 Management of arable land: tillage</p><p>Reduced tillage</p><p>In this report, reduced tillage refers to all methods without the use of turning plows. The following crop type is sown into the lightly tilled mulch layer (mulch seed) or directly into the unworked soil (no-till). These methods are widespread in the USA and South America with 40 to 50% of the arable land (Derpsch et al. 2010). No-till is currently still uncommon in Germany. However, more and more farmers are converting to non-turning soil cultivation: the evaluation of the questionnaires on the cultivation of arable land in the BZE-LW (see Chapter 2.3) showed that 18% of the sampling points in the period under review were due to a turning soil. processing was completely dispensed with.<strong> Reduced tillage can help improve the soil structure and reduce the risk of erosion, and it also reduces diesel consumption. <u>However, the effect of reduced tillage on the Corg supply in the soil was often overestimated (Baker et al. 2007, Powlson et al. 2014). While Corg enrichment occurs on the soil surface with reduced tillage, the Corg content decreases in the depths of the arable tops below (Figure 3-49). In the entire soil profile, the Corg supply in the soil often hardly differs between the different soil cultivation variants.</u></strong></p><p>In a meta-analysis of long-term field tests in the temperate climatic zone, taking into account the total depth of the crumb, we found an average of “only” +0.15 ± 0.11 t Corg ha-1 a-1 Corg stock enrichment (mean and standard deviation from 86 studies, 0-46 ± 22 cm depth) with no-till methods without tillage compared to conventional tillage (Figure 3-50 left). In most of the studies, prior use was conventional tillage before the start of the experiment. Many studies also showed corg losses from the soil, so the accumulation was not significant. Likewise, due to reduced soil tillage (mulch sowing) in long-term tests (> 30 years) there was no significant change in the Corg stock with + 0.16 ± 0.10 t Corg ha-1 a-1 compared to conventional tillage (mean and Standard deviation from 36 studies; 0-37 ± 13 cm depth; Figure 3-50 right).</p><p></p><p></p><p> Figure 3-49: Distribution of the carbon in the soil profile with reduced (no-till) compared to conventional (turning) tillage</p><p></p><p>[ATTACH=full]999588[/ATTACH]</p><p></p><p>Figure 3-50: Change in the supply of organic carbon (Corg) in the topsoil (mean: 0-29.7 cm) after the introduction of no-till (left, 86 field studies, 0-46 ± 22 cm depth) or mulch sowing (right , 36 field studies, 0-37 ± 13 cm depth) compared to a reference treatment variant with conventional</p><p>processing (plow)</p><p></p><p>[ATTACH=full]999590[/ATTACH]</p></blockquote><p></p>
[QUOTE="PSQ, post: 7855881, member: 11374"] The part of the report referred to by the OP, with the bit saying [I]DD claims are often inflated[/I] [B][U]highlighted and underlined[/U][/B]: [URL]https://www.thuenen.de/media/institute/ak/Allgemein/news/Thuenen_Report_64_final.pdf[/URL] 194 Results and Discussion Chapter 3 3.2.10.3 Management of arable land: tillage Reduced tillage In this report, reduced tillage refers to all methods without the use of turning plows. The following crop type is sown into the lightly tilled mulch layer (mulch seed) or directly into the unworked soil (no-till). These methods are widespread in the USA and South America with 40 to 50% of the arable land (Derpsch et al. 2010). No-till is currently still uncommon in Germany. However, more and more farmers are converting to non-turning soil cultivation: the evaluation of the questionnaires on the cultivation of arable land in the BZE-LW (see Chapter 2.3) showed that 18% of the sampling points in the period under review were due to a turning soil. processing was completely dispensed with.[B] Reduced tillage can help improve the soil structure and reduce the risk of erosion, and it also reduces diesel consumption. [U]However, the effect of reduced tillage on the Corg supply in the soil was often overestimated (Baker et al. 2007, Powlson et al. 2014). While Corg enrichment occurs on the soil surface with reduced tillage, the Corg content decreases in the depths of the arable tops below (Figure 3-49). In the entire soil profile, the Corg supply in the soil often hardly differs between the different soil cultivation variants.[/U][/B] In a meta-analysis of long-term field tests in the temperate climatic zone, taking into account the total depth of the crumb, we found an average of “only” +0.15 ± 0.11 t Corg ha-1 a-1 Corg stock enrichment (mean and standard deviation from 86 studies, 0-46 ± 22 cm depth) with no-till methods without tillage compared to conventional tillage (Figure 3-50 left). In most of the studies, prior use was conventional tillage before the start of the experiment. Many studies also showed corg losses from the soil, so the accumulation was not significant. Likewise, due to reduced soil tillage (mulch sowing) in long-term tests (> 30 years) there was no significant change in the Corg stock with + 0.16 ± 0.10 t Corg ha-1 a-1 compared to conventional tillage (mean and Standard deviation from 36 studies; 0-37 ± 13 cm depth; Figure 3-50 right). Figure 3-49: Distribution of the carbon in the soil profile with reduced (no-till) compared to conventional (turning) tillage [ATTACH type="full" alt="Screen Shot 2021-11-25 at 15.40.58.png"]999588[/ATTACH] Figure 3-50: Change in the supply of organic carbon (Corg) in the topsoil (mean: 0-29.7 cm) after the introduction of no-till (left, 86 field studies, 0-46 ± 22 cm depth) or mulch sowing (right , 36 field studies, 0-37 ± 13 cm depth) compared to a reference treatment variant with conventional processing (plow) [ATTACH type="full" alt="Screen Shot 2021-11-25 at 16.02.55.png"]999590[/ATTACH] [/QUOTE]
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