Careful management of plant nutrients is more important than ever because of volatile grain/fertilizer price ratios and public concerns about water quality impairment due to excess nutrient loss from fields. The management concepts most relevant to increase the efficacy of crop production while limiting water quality impairment are different for nitrogen (N) than for less mobile nutrients such ...

Index words: Watershed studies Best Management Practices Restoration Remediation Aquatic systems Studies that evaluate the linkages between watershed improvement through Best Management Practices (BMPs) and downstream outcomes are few. Water quality of coastal waters is often impacted by soil and nutrient loss fromwatersheds in agriculture. Mitigation of these impacts is of concern in the Great...

The REGFLUD-project addresses the problem of diffuse pollution that is largely caused by agricultural production. The overall objective is the development and application of multi-criteria scientific methods to set-up a Decision Support System aimed at reducing diffuse pollution in river catchments subject to economic feasibility and social acceptability. The project is structured according to ...

Extreme hydro-meteorological events such as droughts are becoming more frequent, intense, and persistent. This is particularly true in the south central USA, where rapidly growing urban areas are running out of water and human-engineered water storage and management are leading to broad-scale changes in flow regimes. The Kiamichi River in southeastern Oklahoma, USA, has high fish and freshwater...

Recent investigations of nutrient-limited productivity in coral reef macroalgae have led to the conclusion that phosphorus, rather than nitrogen, is the primary limiting nutrient. In this study, comparison of the dissolved inorganic nitrogen:phosphorus ratio in the water column of Kaneohe Bay, Hawaii, with tissue nitrogen:phosphorus ratios in macroalgae from Kaneohe Bay suggested that nitrogen,...

Water is an essential nutrient for all physiological functions and particularly important for thermoregulation. About 60% of our body weight is made of water. Under standard conditions (18-20 °C and moderate activity), water balance is regulated within 0.2 % of body weight over a 24-hour period. Water requirement varies between individuals and according to environmental conditions. Concerning c...