نتایج جستجو برای: pedogenesis
تعداد نتایج: 221 فیلتر نتایج به سال:
Long-term soil and ecosystem development involves predictable changes in nitrogen (N) and phosphorus (P) availability and limitation, but far less is known about comparable changes in sulfur (S) despite its importance as an essential plant macronutrient and component of soil organic matter. We used a combination of elemental analysis, X-ray absorption spectroscopy, hydrolytic enzyme assays, and...
Changes in surface charge of soil particles that accompany mineral transformations during soil formation were measured for a humid tropical chronosequence in Hawaiian basalt ranging in lava flow age from 0.3 to 4100 kiloyears (ky). Parent mineralogy is dominated by glass, olivine, pyroxene, and feldspar, whereas poorly crystalline (PC) weathering products (allophane, microcrystalline gibbsite, ...
We conducted soil surveys on two islands in the Peros Banhos and Salomon atolls of northern Chagos Archipelago, Indian Ocean. found muted but consistent topographic zonation from ocean shores to lagoons. The main elements are: berms coral boulders rubble along heads ocean-side beaches; rubble-strewn soils inland berm; pale sands with shallower topsoils few clasts slight rises declivities over r...
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