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Chapter 10: Grasslands
Pages 79-84

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From page 79...
... Carbon storage in grasslands is sensitive to climate, operating primarily through variation in the length of the growing season; and while there is unrealized potential to store additional carbon in these systems through proper management, with current practices this system is expected to become less of a sink with time. The authors define grasslands in part as ecosystems that occur in areas where average annual evapotranspiration is greater than precipitation.
From page 80...
... , another major uncertainty is how much carbon sequestration in grasslands can be increased through management practices, plant breeding, or genetic modified organisms. • Are the data and analyses handled in a competent manner?
From page 81...
... - not only on carbon uptake. This would help illustrate that the sensitivity of GPP and Reco to these climate factors will likely differ, and this determines the net carbon sink or source strength of grasslands.
From page 82...
... Need more discussion of timing of precipitation P390, Line 25 – P392 Line 19 The discussion of "societal drivers" would benefit from a short paragraph stating which other practices along with changes in grazing management and fire regime could potentially increase carbon sequestration in grasslands. It would also be interesting if the authors could link this to the uncertainty in future carbon stocks in grasslands.
From page 83...
... P393, Line 32-33 Is this true even when considering row crops? P395, Line 21-29 A major uncertainty is how much we can increase carbon sequestration in grasslands through management practices, plant breeding or genetic modified organisms -- because of the lack of field data.

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