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Farm Business
Politics, Covid19 and Brexit
What do we think of Drax?
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<blockquote data-quote="delilah" data-source="post: 7731961" data-attributes="member: 76758"><p>Someone put this on here a while ago, i've saved it as a go-to quote for whenever trees are touted as being better than PP. </p><p></p><p><em>In the work of Guo and Gifford (2002) a meta-analysis was undertaken of data from 74 international land use change and soil carbon storage studies. It measured the effects of land use change in 537 instances and was used to determine the importance of land use and land use change on soil carbon stocks. The analysis showed that there was a decline in soil carbon stocks after land use conversion from grassland to plantation forest (−10 percent), native forest to plantation forest (−13 percent), native forest to cropland (−42 percent), and grassland to cropland (−59 percent). There were significant increases in soil carbon stocks after land use changes from native forest to grassland (+8 percent), cropland to grassland (+19 percent), cropland to plantation (+18 percent), and cropland to secondary forest (+53 percent). The conversion of native forest or grassland to broadleaf deciduous tree plantation had no effect on soil carbon stocks, but conversion to pine or conifer forest reduced soil carbon by between 12 and 15 percent. This analysis of land use change and soil carbon data also suggested that, if a given land use change is responsible for soil carbon losses, then the reverse change could potentially increase soil carbon stocks. But it is important to recognise that it can take decades if not centuries to recover to the original level of soil carbon stocks after disturbance due to land use change (Guo and Gifford, 2002).</em></p></blockquote><p></p>
[QUOTE="delilah, post: 7731961, member: 76758"] Someone put this on here a while ago, i've saved it as a go-to quote for whenever trees are touted as being better than PP. [I]In the work of Guo and Gifford (2002) a meta-analysis was undertaken of data from 74 international land use change and soil carbon storage studies. It measured the effects of land use change in 537 instances and was used to determine the importance of land use and land use change on soil carbon stocks. The analysis showed that there was a decline in soil carbon stocks after land use conversion from grassland to plantation forest (−10 percent), native forest to plantation forest (−13 percent), native forest to cropland (−42 percent), and grassland to cropland (−59 percent). There were significant increases in soil carbon stocks after land use changes from native forest to grassland (+8 percent), cropland to grassland (+19 percent), cropland to plantation (+18 percent), and cropland to secondary forest (+53 percent). The conversion of native forest or grassland to broadleaf deciduous tree plantation had no effect on soil carbon stocks, but conversion to pine or conifer forest reduced soil carbon by between 12 and 15 percent. This analysis of land use change and soil carbon data also suggested that, if a given land use change is responsible for soil carbon losses, then the reverse change could potentially increase soil carbon stocks. But it is important to recognise that it can take decades if not centuries to recover to the original level of soil carbon stocks after disturbance due to land use change (Guo and Gifford, 2002).[/I] [/QUOTE]
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