Nitrogen and phosphorus loadings from cultivated land 2.

Effects of maize cultivation on nitrogen and phosphorus loadings to drainage channels in Central Chile.

There are concerns about the impact of maize cultivation with high applications of nitrogen (N) and phosphorus (P) on water quality in surface waters in Mediterranean Central Chile. This study estimated the contribution of N and P from maize fields to nearby drainage channels and evaluated the effects in water quality. An N and P budget was drawn up for three fields managed with a maize-fallow ...

Sustainable Phosphorus Loadings from Effective and Cost-Effective Phosphorus Management Around the Baltic Sea

Nutrient over-enrichment of the Baltic Sea, accompanied by intensified algal blooms and decreasing water clarity, has aroused widespread concern in the surrounding countries during the last four decades. This work has used a well-tested dynamic mass-balance model to investigate which decrease in total phosphorus loading would be required to meet the environmental goal to restore the trophic sta...

Relation of Land-use to Total Nitrogen/ Phosphorus in Streams

Comprehensive watershed management requires the determination of both point and non-point sources of pollution within a watershed. The primary non-point source pollutants in a watershed are nutrients, sediment, animal wastes, salts, and pesticides. Nutrients are mainly nitrogen and phosphorous. Agricultural activities and wastewater treatment plants are the principal sources of nitrogen in surf...

Prediction of runoff and sediment from agricultural watersheds by a mathematical model. 3 sediment -bound and soluble phosphorus loadings.

Optimization of nitrogen and phosphorus removal from meat processing wastewaters using microalgal biofilms

Background: The conventional activated sludge processes are not able to completely treat the nitrogen and phosphorus compounds of meat processing wastewaters. Microalgal biofilm, which has the advantages of easiness and inexpensiveness, can be applied as a post-treatment method. Methods: The optimal levels of micronutrients and N/P ratio were aimed in the cultivation of Scenedesmus quadricauda...