Tillage Management and Soil Organic Matter, 2005

Tillage systems play a significant role in agricultural production throughout Iowa and the Midwest. It has been well documented that increased tillage intensities can reduce soil organic matter in the topsoil due to increased microbial activity and carbon (C ) oxidation. The potential loss of soil organic matter due to tillage operations is much higher for high organic matter soils than low organic matter soils. Tillage effects on soil organic matter can be magnified through soil erosion and loss of soil productivity. Soil organic matter is a natural reservoir for nutrients, buffers against soil erosion, and improves the soil environment to sustain soil productivity. Maintaining soil productivity requires an agriculture management system that maintains or improves soil organic matter content. Combining cropping systems and conservation tillage practices, such as no-tillage, strip-tillage, or ridge-tillage, are proven to be very effective in improving soil organic matter and soil quality.

Does Health Information Matter for Modifying Consumption?, October 2006

A field experiment was conducted in France to evaluate the impact of health information on fish consumption. A warning given to the treatment group revealed the risks of methylmercury contamination in fish and also gave consumption recommendations. Using difference-indifferences estimation, we show that this warning led to a significant but relatively weak decrease in fish consumption. However, consumption of the most contaminated fish did not decrease despite advice to avoid consumption of these types of fish. Accompanying questionnaires show that consumers imperfectly memorize the fish species quoted in the warning. The results point to the relatively poor efficacy of a complex health message, despite its use by health agencies around the world.

A Matter of Substance, January 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, April 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, July 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, August 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, October 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, September 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, November 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, December 2009.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, January 2010.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, March 2010.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, May 2010.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, June 2010.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.

A Matter of Substance, July 2010.

A publication of the IDPH Division of Behavioral Health to find out what's happening with Substance Abuse Prevention and Treatment.