Invloed bemesting op de chemische samenstelling van het grondwater

Grondwaterverontreiniging kan worden veroorzaakt door diffuse bronnen zoals bemesting, neerslag en wegenzout en door puntbronnen zoals afvalwater van huishoudens en industrie, vuilstortplaatsen, enz. Ongeveer 70% (ca. 2 miljoen ha) van het grondoppervlak in Nederland is in gebruik voor de landbouw. Door het intensieve gebruik van dierlijke mest en kunstmeststoffen is in het landelijk gebied de landbouw een belangrijke potentiële vervuiler van grond- en oppervlaktewate

A General Discontent Disentangled: A Conceptual and Empirical Framework for Societal Unease

Surveys show discontent with society to be prevalent among the general public across western societies. However, this undercurrent, here called societal unease, has received little scientific attention. This article has four aims. First, it proposes a conceptual model of societal unease by integrating a broad range of interdisciplinary literature. Second, it tests this conceptual model empirically with survey data from the Netherlands. Confirmatory factor analyses confirm a latent dimension of societal unease behind attitudes about five aspects of society. Third, it shows societal unease to be highly related to societal pessimism, moderately to anomia and weakly to happiness. Finally, it explores the association of societal unease with various demographic, attitudinal and behavior characteristics

One of a Kind, or All of One Kind? Groups of Political Participants and Their Distinctive Outlook on Society

Political participation can take shape in many types of participation, between which the overlap is low. However, the similarities and differences between various types of participants are surprisingly understudied. In this article, I propose to differentiate between four types of participants: institutional political participants, non-institutional political participants, civic participants, and political consumers. These types differ from each other on two dimensions: whether they are political or publicly oriented and whether they are formally or informally organized. Building on the matching hypothesis, I argue that we should differentiate those four types of participants by their outlook on society (societal pessimism, political trust, and social trust). Using data from the European Social Survey 2006, including participants from 19 countries, logistic regressions show that institutional political participants trust politics rather than people, non-institutional political participants are societal pessimists who trust other people, civic participants are societal optimists who trust other people, and political consumers are pessimists who do not trust politics

De invloed van een aantal factoren op de denitrificatie : een literatuurstudie

Aan het denitrificatieproces is de afgelopen decennia bijzonder veel aandacht besteed vanuit het landbouwkundig onderzoek omdat belangrijke hoeveelheden stikstof uit kunstmest en organische mest via dit proces verloren gingen naar de atmosfeer. Recent is echter meer onderzoek op gang gekomen naar de betekenis van het denitrificatieproces voor de vermindering van de stikstofbelasting van grond- en oppervlaktewate