14 uppsatser
ett laboratorieförsök för att öka förståelsen för fosfordynamiken inom växtodlingen
Phosphorus is the single most potent contributor to eutrophication of freshwater and has also been shown to contribute to the toxic algae blooms in the Baltic sea. The dynamics and paths of losses of phosphorus from arable lands are not fully understood. It is known that …
en jämförelse av indikatorer för att beskriva näringsbelastningen
… nutrients is the annual algal blooms. One of the main sources of nitrogen and phosphorus supply is agriculture. Nutrient losses from arable land have been increasing as agricultural production has intensified. At the end of the twentieth century an increased awareness of these …
… JHC, and how an expansion of the horse keeping may affect the risk of enhanced phosphorus load to the nearby lake system Vansjön ? Nordsjön. The risks associated with outdoor horse keeping are an accumulation of phosphorus in the soil profile caused by dung deposition and …
Phosphorus is essential to all plants and is taken up from the soil as the ion H2PO4 - (and to some extent HPO42-). Plant availability depends on, among other factors, the soil pH. In order to provide for plant available phosphorus, it is applied as mineral fertilizers and …
Large amounts of phosphorus (P) are lost from the arable land due to water erosion. Both phosphorus attached to particles and dissolved phosphorus (mainly phosphate) are transported away with drainage-water and surface runoff. Good soil structure is important in minimizing these …
comparisons of different laboratory methods as indices for phosphorus leaching to waters
… Sea is a serious problem. A major contributing factor is diffuse losses of phosphorus (P) from agricultural land in surrounding countries. In order to estimate P losses, environmental monitoring of small agriculture-dominated catchments is being carried out in most of these …
Betydelsen av antalet beviljade dispenser av stallgödselspridning vid Sagån
… ecosystem. In Mälardalen we find the most eutrophic lakes. Most of the applied phosphorus and nitrogen into seas and oceans comes from agriculture, and the nutrients losses are affected by local weather conditions and soil type. Guidelines for storage and distribution of manure …
metodutveckling med GIS
… of data and geographic informationsystem (GIS) to identify areas with risk for phosphorus losses due to surfacerunoff. This tool can act as a decision support to decide where appropriatemeasures should be applied with the aim of reducing phosphorus losses and bythat the …
… of nutrients from agricultural land or effluents. Losses of particulate phosphorus through water erosion contribute to a great extent to this eutrophication. In the action plan for the water district cover crops are mentioned as a measure for reducing losses of phosphorus from …
en litteraturstudie
… this essay is to find out if liming with Ca(OH2) and CaO can reduce leachingof phosphorus from agricultural land and the problem with eutrophication. This purpose alsoincludes getting knowledge about how to make the phosphorus retained in the soil and beaccessible for the …
… benthic macroinvertebrates. The chemical elements in lakes consist of total phosphorus, total nitrogen, quotient total nitrogen/total phosphorus, chemical oxygen demand, alkalinity and pH-value. The chemical elements in streams consist of area-specific losses of total phosphorus …
… with high starch and good stalk strength. The corn got 129 kg nitrogen, 28 kg phosphorus and 100 kg potassium. The plant nutrition was given as liquid manure, start nutrition with mineral fertilizers and Nitrogen 27 sulphur. The planting time was the 28 of April, when the soil …
… wateris pumped into storage. It was found that the amount of nitrogen (N) and phosphorus (P) that had been gatheredin the different ponds varied a lot between ponds, due to differences in nutrient levels in the streams and todifferences in when ponds were filled. A maximum of 98 …
… wateris pumped into storage. It was found that the amount of nitrogen (N) and phosphorus (P) that had been gatheredin the different ponds varied a lot between ponds, due to differences in nutrient levels in the streams and todifferences in when ponds were filled. A maximum of 98 …
