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You searched for subject:(Mass defect labeling High throughput proteomic studies using fourier transform ion cyclotron resonance mass spectrometry Thesis 10724 20051 Bossuyt Heleen 2003 05 Understanding soil organic matter SOM dynamics AND their interactions with different management practices AND soil faunal activities is essential in trying to develop sustainable agroecosystems In this study the effects of tillage AND earthworm activity on SOM AND carbon C protection were investigated In the first experiment the objective was to study the mechanisms by which C is protected under no tillage NT management using 14C labeled plant residue Aggregate size distribution total C AND 14C were measured together with different pools of aggregate associated C AND 14C from 21 d laboratory incubations of intact AND crushed macro AND microaggregates The results indicated that i more young C 14C is accumulated in the subsurface soil of conventional tillage CT than NT but this C is NOT stabilized in the long term AND ii short AND long term stabilization of C is higher in the soil surface layers under NT compared with CT This C stabilization occurs mainly at the microaggregate level The objectives of the next set of experiments were to investigate the effects of different earthworm species Aporrotedea caliginosa AND Lumbricus rubellus on aggregation aggregate associated C pools AND the formation of stable microaggregates within macroaggregates Two incubations were set up The first incubation consisted of soil samples crushed 60). No records match your search.

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