Talk:Plant root exudates

Wiki Education Foundation-supported course assignment
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Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 18:00, 18 January 2022 (UTC)

Carbon content
Invasive Spices copied this from User talk:Patrickmckennaniab.


 * I reverted my reversion of 's version. I am uncertain about what text belongs here but after further examination I agree that his vaguer text and more recent citation is preferable.
 * My reasoning for my first reversion to the Walker version was as follows. When claiming 5-21% Walker refers to Marchner 1995 . (You are correct that Marschner et al. 1987 is about barley and iron but the 5-21% claim comes from the 1995 book.)
 * There are nonetheless several problems with the Walker version.
 * I am unable to find the 5-21% number in the book. Walker does not provide a page number.
 * There are many more recent publications we might use.
 * The more recent Jones you cite gives a 5% number.
 * However Jones also has downsides. That statistic is for all soil residues, pertains to shoot stage plants and is the result of tests in CO2 injected chambers.
 * I think the Walker version attempted to extract too much specificity out of too little available data. I am far from an expert in this exact statistic but I am certain none of these sources is perfectly satisfactory for exactly what % of photosynthetically fixed carbon is transferred from plants to the rhizosphere via root exudates. Your text reflects that and so I reverted my reversion. Invasive Spices (talk) 24 June 2022 (UTC)