Root Parameters Show How Management Alters Resource Distribution and Soil Quality in Conventional and Low-Input Cropping Systems in Central Iowa.

The only marginally significant temporal trend observed was a decrease ( p = 0.008) in POM-C concentrations that occurred between spring and fall during the maize phase of the 3YR rotation, where POM-C fell from a spring high of 2.79 g cm -3 to a fall value of 1.48 g cm -3 ( Fig 1A ).

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