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4 results for “soil aggregate stability”
Mineral Protection rather than Aggregate Stability Enhanced Soil Organic Carbon Along an Elevated Gradient in Alpine Areas of Southwest China
<p>This data contains Background, Dominant plant and their biomass, Environmental variables, Aggregate stability, Fe/Al oxides, Mass of soil density fractions, Carbon contetn in each density fraction, Mass of aggregates, Carbon content in each aggregate class size, Ratio of carbon content in each soil density and aggregate fractions and Enzyme avtivity of our investigated sites. Total 46 factors were given.</p>
Data from: Soil aggregate stability and grassland productivity associations in a northern mixed-grass prairie
Soil aggregate stability data are often predicted to be positively associated with measures of plant productivity, rangeland health, and ecosystem functioning. Here we revisit the hypothesis that soil aggregate stability is positively associated with plant productivity. We measured local (plot-to-plot) variation in grassland community composition, plant (aboveground) biomass, root biomass, % water-stable soil aggregates, and topography. After accounting for spatial autocorrelation, we observed a negative association between % water-stable soil aggregates (0.25-1 and 1-2 mm size classes of macroaggregates) and dominant graminoid biomass, and negative associations between the % water-stable aggregates and the root biomass of a dominant sedge (Carex filifolia). However, variation in total root biomass (0-10 or 0-30 cm depths) was either negatively or not appreciably associated with soil aggregate stabilities. Overall, regression slope coefficients were consistently negative thereby indicating the general absence of a positive association between measures of plant productivity and soil aggregate stability for the study area. The predicted positive association between factors was likely confounded by variation in plant species composition. Specifically, sampling spanned a local gradient in plant community composition which was likely driven by niche partitioning along a subtle gradient in elevation. Our results suggest an apparent trade-off between some measures of plant biomass production and soil aggregate stability, both known to affect the land's capacity to resist erosion. These findings further highlight the uncertainty of plant biomass-soil stability associations.
Data from: Soil aggregate stability and grassland productivity associations in a northern mixed-grass prairie
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Data from: Impacts of long-term tillage and fertilization on soil carbon stock and aggregate stability in tropical agriculture
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