Authors: Bol, R Ostle, NJ Friedrich, C Amelung, W Sanders, I

Citation: R. Bol et al., The influence of dung amendments on dissolved organic matter in grassland soil leachates - Preliminary results from a lysimeter study, ISOT ENV H, 35(1-2), 1999, pp. 97-109

Authors: Schmidt, O Ostle, NJ

Citation: O. Schmidt et Nj. Ostle, Tracing nitrogen derived from slurry in earthworms using N-15/N-14 stable isotope ratios at natural abundances, APPL SOIL E, 12(1), 1999, pp. 7-13

Authors: Ostle, NJ Bol, R Petzke, KJ Jarvis, SC

Citation: Nj. Ostle et al., Compound specific delta N-15 & PTSTHOUSND; values: amino acids in grassland and arable soils, SOIL BIOL B, 31(12), 1999, pp. 1751-1755

Authors: Bol, R Ostle, NJ Petzke, KJ Watson, A Cockburn, J

Citation: R. Bol et al., Amino acid N-15/N-14 analysis at natural abundances: A new tool for soil organic matter studies in agricultural systems, ISOT ENV H, 34(1-2), 1998, pp. 87-93