The main research question of this thesis was: Can nitrogen cycling on dairy farms on peat soil in the Dutch Green Heart area be improved by adapting management to the nitrogen supply from soil and by using other grassland species and crops without affecting milk production?

Soil is a home for an unbelievable diversity and abundance of microbial life that is essential for supporting life on our planet.

The soil ecosystem consists of the largest reservoir of biodiversity on Earth.

How soil microbial composition impacts structure and composition of the aboveground plant and animal communities?

Soil biodiversity is of great importance for the maintenance of multifunctionality in terrestrial ecosystems.

Organic amendments applied to agricultural fields can partially offset our carbon emissions to the atmosphere and improve the resilience of agriculture to the effects of climate change. Driving these benefits, however, are complex and poorly understood interactions between organic amendment properties,…

Promotor: J.A. van Veen, Co-promotor: E.E. Kuramae

In this thesis, the role of plant-mediated soil legacy effects in shaping aboveground plant-insect interactions was investigated.

Promotores: J.A.van Veen, P.L.G.Klinkhamer. Co-promotor: E.E.Kuramae

Paul Hudson, universitair hoofddocent Fysische Geografie bij Leiden University College, onderzoekt de menselijke invloeden op rivieren in laagland in zijn nieuwe boek.

In this thesis, I focused on studying the above- and belowground interactions of J. vulgaris from a plant-soil feedback (hereafter, PSF) perspective. I investigated the temporal variation of negative PSF and examined the effects of root-associated bacteria on plant performance and aboveground herbiv…

Plants and soils from natural ecosystems harbor great diversity of soil microorganisms, which could potentially contribute to the sustainability of horticulture. The knowledge about using wild plant species and soil from natural ecosystem to improve the crop health will advance the application of ecological…

By growing in a soil plants change the biotic and abiotic properties of the soil in which they grow.

Promotores: Prof.dr. H. van Veen & Prof.dr. W. de Boer (Wageningen University)

How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?

The use of N fertilizers has increased worldwide in the past century. While this increased input of N has increased food productivity, it has also contributed to decreases in biodiversity, soil quality and environmental health, including increases in greenhouse gas emissions.

Vinasse is a major by-product generated by the sugarcane biofuel industry. It is a source of microbes, nutrients and organic matter and often it is recycled as fertilizer.

Gisteren verscheen er een artikel in Biznews over het watertekort in California. David Zetland, universitair docent aan het Leiden University College The Hague, gaf zijn mening over dit probleem.

In this PhD study, I aim to deepen our understanding of the influence of major mycorrhizal types, namely arbuscular mycorrhizae (AM) and ectomycorrhizae (EM), on the global soil carbon cycle and their potential distribution changes under future environmental shifts.

Promotors: Prof.dr. G.R. de Snoo, Prof.dr. G.A. Persoon, Prof.dr.ir. H.H. de Iongh

This thesis examines the impacts and challenges of water use of electric power system. This thesis found that there are large differences in water use of electricity technologies, with hydropower and thermal power being two large water users.

The International Course on Water Use and Management in Cagayan Valley The Philippines (2011-2015)

Before the large scale use of renewable energy sources can be implemented in our society, the storage of electrical energy needs to be tackled. Storage the energy as hydrogen via the reduction of protons is a good option.

De Universiteit Leiden houdt haar drinkwaterverbruik zo laag mogelijk.

Terwijl crises als gevolg van terrorisme, burgeroorlogen en natuurrampen het wereldnieuws domineren, is het niet vreemd dat veiligheid en crisismanagement - inclusief de perceptie van risico's - boven aan de maatschappelijke en bestuurlijke agenda's staan.

Promotor: M.T.M. Koper, Co-Promotor: L.B.F. Juurlink

De specialisatie Public Management and Leadership legt de nadruk op hoe het gedrag van cruciale actoren – politici, topambtenaren, uitvoerende professionals en burgers – essentieel is voor het begrijpen en verbeteren van publiek bestuur. Deze specialisatie combineert bestuurskunde met psychologie, bedrijfsmanagement…

Water is all around us and is vital for all aspects of life. Studying the various compounds and life forms that inhabit natural waters lets us better understand the world around us.

Promotor: Prof.dr. B.R. Katzy, Prof.dr. J. de Vries

Striga hermonthica, commonly known as witchweed, infests major cereal crops in Sub-Saharan Africa causing severe yield losses and threatening the livelihood of millions of resource poor farmers.

To design the ideal water oxidation catalyst, understanding of the catalytic mechanism and decomposition pathways is essential.

Climate change is one of the largest challenges faced by humanity. To combat this research into alternatives to fossil fuels is ongoing. Dihydrogen is considered a good alternative fuel, since its burning only forms water.

Producing green energy has become the main goal in our society in the search of reducing or eliminating the carbon emission from fossil fuels.

Het onderzoekscluster ‘Conflict, Conflict Resolution and Crisis Management’ maakt deel uit van het onderzoeksprogramma ‘Institutions, Decisions and Collective Behaviour’. De betrokken onderzoekers bestuderen hoe politieke conflicten ontstaan en welke typen crises we kunnen onderscheiden. Hoe hanteren…

Material circularity and energy efficiency are highly relevant and intertwined issues for the transition towards a carbon-neutral and circular built environment. In the Netherlands, the building sector has been rendered a priority towards a circular and low-carbon society.

Nederland telt een achttal echte eilanden, of negen als ‘Rottum’ (Rottumeroog en Rottumerplaat) voor twee wordt gerekend. Daarnaast zijn er zeventien voormalige eilanden, waar de sfeer van vroeger nog voelbaar is. Jan Bank en Doeko Bosscher, fervente eilandliefhebbers, onderzoeken de geschiedenis van…

Astronomical observations of cold regions in the universe show a rich inventory of ices. Part of these ices may end up on planets like our own, but in that journey they will be exposed to considerable amounts of radiation.

While ecosystems have concrete benefits for human society, these benefits are typically overlooked in decision-making.

This article 'Shaping the European External Action Service and its post-Lisbon crisis management structures: an assessment of the EU High Representatives’ political leadership' assesses the role, influence and core aspects of the EU High Representatives’ (HR/VPs) “political leadership” in the context…

Op 18 januari is de studie ‘Stille wateren hebben diepe gronden – Een analyse van de inkomensverdeling en haar determinanten over de afgelopen veertig jaar’ verschenen. Op deze website kunnen de studie en het achterliggend cijfermateriaal geraadpleegd worden.

Consequences for sediment stability and seston trapping

What are the global relationships between environmental conditions and abundance of distinct types of mycorrhizal fungi in soil and plant roots?

De

In this dissertation, the synthesis and characterization of a series of iron complexes based on different ligand platforms are described.

Promotor: W.T. de Groot

Achter de relatief stabiele inkomensongelijkheid in Nederland gaan grote veranderingen schuil. De inkomensongelijkheid is de afgelopen veertig jaar wel toegenomen maar viel vooral minder sterk uit doordat vrouwen in lagere inkomensgroepen meer zijn gaan werken. Ondertussen is het inkomen van mannen…