The effect of cropping system on the distribution of organic carbon (OC) and nitrogen (N) in soil aggregates has not been well addressed, which is important for understanding the sequestration of OC and N in agricultural soils. We analyzed the distribution of OC and N associated with soil aggregates in three unfertilized cropping systems in a 27-year field experiment: continuously cropped alfal...

Anthropogenic effects on watersheds are important in explaining the decline of Pacific Northwest salmon stocks. Associations were tested between thirteen anthropogenic variables in 202 watersheds in Washington, Oregon, Idaho and California and the stock status of summer, spring and fall Chinook Onchorhynchus tshawytsha, coho O. kisutch, and winter steelhead O. mykiss. Summer Chinook had the hig...

In the stock market, investors can invest in stocks to obtain profit. But there are many individual persons without professional investment knowledge about the stock market. It is difficult for them to choose stocks with high returns. After they have chosen the good stocks, it is also difficult for them to choose the time for selling or buying the stock. So, most of investors would lose money i...

In this paper we consider the measurement and pricing of distress risk. We present a model of corporate failure in which accounting and market-based measures forecast the likelihood of future …nancial distress. Our best model is more accurate than leading alternative measures of corporate failure risk. We then use our measure of …nancial distress to examine the performance of distressed stocks ...

Stocks appear to have investor clienteles based on their business practices and products. The variety in expressive benefits each individual receives from owning controversial stocks causes them to modify their portfolio to accommodate their beliefs. We examine the ownership of firms with social concerns and sin stocks (tobacco, alcohol and gambling). Women tilt their portfolios towards stocks ...

Introduction Conclusions References

The relative proportions of metal residing in ore in the lithosphere, in use in products providing services, and in waste deposits measure our progress from exclusive use of virgin ore toward full dependence on sustained use of recycled metal. In the U.S. at present, the copper contents of these three repositories are roughly equivalent, but metal in service continues to increase. Providing tod...