Sökning: "agricultural soil"
Visar resultat 16 - 20 av 329 avhandlingar innehållade orden agricultural soil.
16. Soil nitrogen fluxes and root uptake in the boreal forest : key processes to plant nitrogen nutrition
Sammanfattning : Nitrogen (N) is essential for growth and net primary production of plants. However, N acquisition by plants is influenced by movement of soil N compounds from bulk soil to plant roots and uptake of N by roots. This thesis is aimed at deepening our knowledge on these key processes involved in plant N acquisition in the N-limited boreal forest. LÄS MER
17. Verticillium longisporum and plant immunity responses in Arabidopsis
Sammanfattning : Verticillium spp. are soil-borne ascomycete fungi belonging to a subgroup of Sordariomycetes, and the three major plant pathogens Verticillium longisporum, V. dahliae and V. albo-atrum cause disease on numerous plant species worldwide. LÄS MER
18. Impacts of clear-cutting on soil fungal communities and their activities in boreal forests - A metatranscriptomic approach
Sammanfattning : Large-scale forestry has reduced and fragmented the area of primary forest and greatly impacted communities of organisms, above and below ground. Fungal com-munities, which are pivotal in boreal forest soil functions, are vulnerable to tree har-vesting. LÄS MER
19. Improving our understanding of carbon cycling in agroecosystems by studying δ¹³C signatures in soil carbon stocks and fluxes : results from a Swedish long-term field experiment
Sammanfattning : Soil carbon (C) storage has gained much attention in the past decade due to its potentially huge impact on climate change mechanisms. Particular focus has been paid to possible feedback mechanisms, whether soil can be considered a sink or source of C and how soils can be managed in order to mitigate climate change. LÄS MER
20. Soil compaction: effects on soil hydraulic properties and preferential water flow
Sammanfattning : Soil compaction caused by passage of agricultural machinery over the surface is an issue in many agricultural soils with a high clay content. Compaction is known to modify soil pore structure and soil hydraulic properties, but can also affect the occurrence of preferential flow. LÄS MER