China’s agricultural nitrogen flows in 2011: Environmental assessment and management scenarios

National Assessment of Capacity in Public Health, Environmental, and Agricultural Laboratories — United States, 2011

In 2011, the University of Michigan's Center of Excellence in Public Health Workforce Studies and the Association of Public Health Laboratories (APHL) assessed the workforce and program capacity in U.S. public health, environmental, and agricultural laboratories. During April-August 2011, APHL sent a web-based questionnaire to 105 public health, environmental, and agricultural laboratory direct...

Assessing reactive nitrogen flows in European agricultural systems

In most ecosystems, nitrogen is a scarce and growth-limiting nutrient. Natural and anthropogenic processes convert unreactive atmospheric dinitrogen (N2) into reactive, bioavailable, nitrogen. This conversion occurs mainly through biological nitrogen fixation (BNF), industrial ammonia (NH3) synthesis, and oxidation of N2 into nitrogen oxides (NOx) during combustion of fossil fuels. The rate of ...

Rethinking Environmental Monitoring and Assessment in Agricultural Research and Development

Grassland Management with Emphasis on Nitrogen Flows

This chapter deals with the challenge to reduce nitrogen (N) excretion and the amount of N able to leach under pasture. N inputs need to be adjusted while limiting adverse effects on animal nutrition and milk production per cow and per hectare. The chapter starts with discussing the origin and variation of N flow in dairy cows. N intake is divided into N exported in milk and N excreted in faece...

A Model-Based Quantitative Assessment of Ecosystem Services in the Scenarios of Environmental Management

It is well recognized that ecological systems generate a spectrum of diverse benefits that are vital to humankind. Sustainable environmental management requires an adequate consideration of ecosystem goods and services. The problem, however, is that many of the ecological and social amenities are not currently incorporated into the decision-making process. A fundamental issue is getting at the ...