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Soil plant nutrient relationships dating

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The Nexus of Soils, Plants, Animals and Human Health

Soil plant nutrient relationships dating
Soil plant nutrient relationships dating
Soil plant nutrient relationships dating
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Journal Articles – Plant Nutrition | ETH Zurich

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Current understanding of phosphorus P cycling in soils can be enhanced by integrating previously discrete findings concerning P speciation, exchange kinetics, and the underlying biological and geochemical processes. Here, we combine sequential extraction with P K-edge X-ray absorption spectroscopy and isotopic methods 33P and 18O in phosphate to characterize P cycling on a climatic gradient in Hawaii. We link P pools to P species and estimate the turnover times for commonly considered P pools. Furthermore, we show that in arid-zone soils, some primary mineral P remains even after ky of soil development, whereas in humid-zone soils of the same age, all P in all pools has been biologically cycled. The integrative information we provide makes possible a more dynamic, process-oriented conceptual model of P cycling in soils.
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