Essays about: "lysimeter"
Showing result 1 - 5 of 9 essays containing the word lysimeter.
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1. Modelling the water balance of a grassland soil
University essay from SLU/Dept. of Soil and EnvironmentAbstract : Expected future climate change characterized by higher temperatures and more frequent summer droughts may cause significant changes in soil hydrological processes leading to limited nutrient and water availability and reductions in plant growth. Soil hydrological and plant growth models attempt to reproduce the complex interactions in the plant-soil water system in terms of mathematical equations, parameters and coefficients. READ MORE
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2. Liming and deep cultivation as long term mitigation actions to lower the rate of peat decomposition and CO2 emissions from peat soils
University essay from SLU/Dept. of Soil and EnvironmentAbstract : Cultivated drained peat soils have a complex relationship towards CO2 emissions and the contribution to global warming. Many people are unaware that the CO2 emissions from peat soils, also known as organic soils, vary a lot within, and between, the fields. Permanent grassland may not always be the best mitigating action for lowering CO2 emissions. READ MORE
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3. Restriction of manure application on high phosphorus soils - Is current research supporting a restriction and what measures are in effect in different European countries?
University essay from Lunds universitet/Miljövetenskaplig utbildningAbstract : The Swedish Water Authorities have proposed a measure to reduce phosphorus losses by restricting manure application on soils with high levels of plant available phosphorus. The aim of this thesis was to investigate if leaching of phosphorus will decrease if the measure is implemented, if the effect is restricted to soils with high phosphorus content and if other European countries have implemented similar measures. READ MORE
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4. Potential uptake of phosphorus by catch crops in greenhouse conditions and release after freezing-thawing
University essay from SLU/Dept. of Soil and EnvironmentAbstract : Catch crops are an important component of cropping systems in Sweden and other Scandinavian countries, but may contribute to phosphorus (P) losses after freezingthawing cycles (FTCs). Eight existing and new catch crop species in Swedish farming were grown in a greenhouse to study potential P uptake and P release from shoots, roots and whole plants after FTCs. READ MORE
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5. An indoor freeze/thaw lysimeter study of phosphorus leaching from soils with four catch crops
University essay from SLU/Dept. of Soil and EnvironmentAbstract : Catch crops have been found to decrease leaching of nitrates into surface and groundwaters, but they also have the potential to increase phosphorus (P) loadings to naturalwaters as well, due to plant cell destruction caused during natural freezing and thawingevents. An indoor lysimeter experiment was carried out using a clay and a sand soil with theapplication of four different plant species: perennial ryegrass cultivar ‘Helmer’ (Loliumperenne L. READ MORE
