OVERSEER® nutrient budgets - moving towards on-farm resource accounting

NutrieNt Budgets for PeNNsylvaNia CroPlaNd

Understanding the distribution and fate of nitrogen and phosphorus in OVERSEER®

OVERSEER® Nutrient Budgets (Overseer) is an agricultural management support tool that examines the flow of nutrients in a farming system. There is increasing pressure from a range of users for transparency of the way Overseer functions, particularly the modelling of nitrogen (N) and phosphorus (P) loss to water. The aim of this paper is to provide a conceptual description of the way Overseer mo...

Towards Job Accounting in Existing Resource Schedulers: Weaknesses and Improvements

The vision of having access to tremendous amounts of computation and storage resources on demand, together with access to special devices, similar to the availability of today’s power grids has been formulated by Ian Foster and Carl Kesselman in [1] in 1997 and since then has been known by the term Grid computing. As this vision slowly became reality and we’re now at the verge to having Grids p...

Quantifying Uncertainty in Forest Nutrient Budgets

Nutrient budgets for forested ecosystems have rarely included error analysis, in spite of the importance of uncertainty to interpretation and extrapolation of the results. Uncertainty derives from natural spatial and temporal variation and also from knowledge uncertainty in measurement and models. For example, when estimating forest biomass, researchers commonly report sampling uncertainty but ...

The Effects of Pond Management Strategies on Nutrient Budgets: Honduras

Semi-intensive shrimp production in Honduras is based upon use of formulated diets to supply nutrients for shrimp growth. Unconsumed feed contributes nutrients to pond water, which when discharged may deteriorate water quality in receiving waters. Estuaries are the water source and sink for shrimp farms in Honduras, and many farms have been established along individual estuaries. A key element ...