The above figure indicates CO2 flux in a farmland system over one growing season. The researchers monitored CO2 flux for corn (NEE-maize), soil near the corn (SR- maize), and soil in a barren field (SR-barefield). Based on this figure, which of the following statements is TRUE? None of these statements is true The corn (NEE-maize) is a carbon sink for part (probably the peak) of the growing season The corn (NEE-maize) is the biggest carbon source Both soils (SR-maize and SR-barefield) are carbon sinks over the entire growing season

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