Sökning: "Tillage"
Visar resultat 1 - 5 av 18 avhandlingar innehållade ordet Tillage.
1. Tillage practices and their impact on soil organic carbon and the microbial community
Sammanfattning : Soil microorganisms are important for climate regulation as well as for plant nutrition. In agricultural soils the microorganisms are affected by management choices, like which type of tillage that is used. LÄS MER
2. Tillage effects on soil respiration in Swedish arable soils
Sammanfattning : The amount of carbon (C) present in soil is greater than the sum of C present in terrestrial vegetation and the atmosphere combined. Small changes in soils can therefore affect atmospheric CO₂ levels and ultimately the global climate. LÄS MER
3. Soil tillage influences on soil mineral nitrogen and nitrate leaching in Swedish arable soils
Sammanfattning : Leaching of nitrogen (N) is an unwanted effect of agriculture practices which contributes to eutrophication of surface waters. This thesis examined how soil tillage practices affect leaching losses of N from arable fields. LÄS MER
4. Effects of structure liming on clay soil
Sammanfattning : Structure lime, comprising 80-85% ground limestone (CaCO3) and 15-20% slaked lime (Ca(OH)2), is applied to clay soils to counteract losses of particulate phosphorus (PP) through aggregate stabilisation. This thesis evaluated the effect of structure lime on soil aggregate stability, aggregate size distribution, draught requirement in tillage and crop yield. LÄS MER
5. Ecology of fungal denitrifiers in terrestrial ecosystems : global patterns and effects of management in agricultural soils
Sammanfattning : Denitrification is the dominant source of nitrous oxide (N2O) from terrestrial ecosystems, a potent greenhouse gas and stratospheric ozone-depleting agent. Fungi can perform denitrification and terminate the process with N2O, making them a potentially important source of N2O. LÄS MER