Phosphorus transfer from agricultural soils to surface waters is an important environmental issue. Commonly used computer models like EPIC have not always been appropriately updated to reflect our improved understanding of soil P transformations and transfer to runoff. Our objectives were

.S. political blogosphere began almost immediately after the U.S. terrorist attacks of 9/11 when the public adopted the blog platform to voice their fears of compromised secu-rity on home soil (Meraz, 2008). A series of connected political events post 9/11 would cement the ideological divide in online political

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Carbon stores in forest ecosystems can be allocated to the tree biomass and soil pools. Because of the difference in the nature of the carbon balance of upland and organic (peat) soils, it is sensible to

-occurring natives. However, the opposite patterns also occur, and patterns of difference between exotics and native species show no trends in some other components of nutrient cycles (for example, the size of soil pools of C and N). In some cases, a given species has different effects at different sites, suggesting

We used eddy covariance; gas-exchange chambers; radiocarbon analysis; wood, moss, and soil inventories; and laboratory incubations to measure the carbon balance of a 120-year-old black spruce forest in Manitoba, Canada. The site lost 0.3 6 0.5 metric ton of carbon per hectare per year (ton C ha21

), and its distribution in labile, Fe-Al bound P, Ca-bound P, humic-fulvic acid P, and residual P pools determined for surface soil (0-15 cm). Most P fertilizer entered Fe-Al and Ca-bound fractions. Cultivation contributed to higher pH and increased the Ca content in soil compared to pasture due

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Fertilizer management has the potential to promote the storage of carbon and nitrogen in agricultural soils and thus may contribute to crop sustainability and mitigation of global warming. In this study, the effects of fertilizer practices [no fertilizer (Control), chemical fertilizer (NPK

The Tibetan Plateau reacts particularly sensitively to possible effects of climate change. Approximately two thirds of the total area is affected by permafrost. To get a better understanding of the role of permafrost on soil organic carbon pools and stocks, investigations were carried out including