R. J. Laughlin

TL;DR: The results indicate that soil pH is of importance in determining the nature of denitrification end products, and significant relationships were observed between nirS, napA, and narG gene copy numbers and the N2O/(N2O + N2) ratio, which are difficult to explain.

TL;DR: It is shown that the MCMC method can simultaneously determine PDFs of more than 8 parameters and it is demonstrated for the first time that it is possible to optimize models where transformations are described by Michaelis–Menten kinetics.

TL;DR: In this article, 15 N-labelled grassland soil was subjected to freezing-thawing conditions to characterise the nitrogen transformation processes operating in soils under these conditions, and a tracing model was developed to quantify the N transformation rates, indicating that previously unavailable N (characterised by high 15 N excess values) must have been either fixed on soil colloids or immobilised by the microbial biomass shortly after fertilizer application.

TL;DR: In this paper, a new 15N tracing model was developed to analyse nitrogen transformations in old grassland soil, which can simulate heterotrophic nitrification, dissimilatory nitrate reduction to ammonium (NH4+) (DNRA), release of adsorbed or stored fertiliser N into the available mineral N pools and immobilisation of NH4+ and NO3− into two separate organic N pools with different re-mineralisation characteristics.

TL;DR: Switching from CAN to stabilised urea formulations was found to be an effective strategy to reduce N2O emissions, particularly in wet, temperate grassland.