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Farm Building and Infrastructure
Rural Diversification
Woodland planting carbon offset
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<blockquote data-quote="N.Yorks." data-source="post: 7416616" data-attributes="member: 46426"><p>Have a look at this abstract (full study link here: <a href="https://thefarmingforum.co.uk/file:///Users/iainmurray1/Downloads/Soil_carbon_changes_after_establishing_woodland_an.pdf" target="_blank">file:///Users/iainmurray1/Downloads/Soil_carbon_changes_after_establishing_woodland_an.pdf</a> )</p><p></p><p>Abstract</p><p>This study determined the effect of two tree planting methods (woodlandand a silvopastoral agroforestry system) on the soil bulk density and organic carbon content of a grassland site in lowland England. Soil organic carbon was measured in pasture, silvopastoral tree, and woodland treatments at six depths representative of 0-150 cm. Fourteen years after tree planting, the organic carbon content in the surface soil layer (0-10 cm) as greatest in the pasture (6.0 g 100 g-1) and least in the woodland (4.6 g100 g-1); the value (5.3 g 100 g-1) below the silvopastoral trees was intermediate. In the 10-20 cmlayer, the organic carbon content in the woodland was 13% lower than the pasture.No treatment effects on soil carbon were detected below 20 cm. Possible reasons for the decline in surface soil carbon include a decline in grass cover and reduced soil water content.<strong> Measurements of above ground carbon storage by the trees indicated that tree planting increased overall carbon storage, with the silvopastoral system predicted to achieve a higher level of carbon storage than equivalent areas of separate woodland and pasture</strong>. A power analysis indicates that a prohibitively large number of replicates is needed to ensure a lower than 20% risk of falsely concluding no treatment differencesat individual depth increments below 10 cm and cumulative depths extending below 40 cm.</p></blockquote><p></p>
[QUOTE="N.Yorks., post: 7416616, member: 46426"] Have a look at this abstract (full study link here: [URL='https://thefarmingforum.co.uk/file:///Users/iainmurray1/Downloads/Soil_carbon_changes_after_establishing_woodland_an.pdf']file:///Users/iainmurray1/Downloads/Soil_carbon_changes_after_establishing_woodland_an.pdf[/URL] ) Abstract This study determined the effect of two tree planting methods (woodlandand a silvopastoral agroforestry system) on the soil bulk density and organic carbon content of a grassland site in lowland England. Soil organic carbon was measured in pasture, silvopastoral tree, and woodland treatments at six depths representative of 0-150 cm. Fourteen years after tree planting, the organic carbon content in the surface soil layer (0-10 cm) as greatest in the pasture (6.0 g 100 g-1) and least in the woodland (4.6 g100 g-1); the value (5.3 g 100 g-1) below the silvopastoral trees was intermediate. In the 10-20 cmlayer, the organic carbon content in the woodland was 13% lower than the pasture.No treatment effects on soil carbon were detected below 20 cm. Possible reasons for the decline in surface soil carbon include a decline in grass cover and reduced soil water content.[B] Measurements of above ground carbon storage by the trees indicated that tree planting increased overall carbon storage, with the silvopastoral system predicted to achieve a higher level of carbon storage than equivalent areas of separate woodland and pasture[/B]. A power analysis indicates that a prohibitively large number of replicates is needed to ensure a lower than 20% risk of falsely concluding no treatment differencesat individual depth increments below 10 cm and cumulative depths extending below 40 cm. [/QUOTE]
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