Prendergast-Miller M, Standen V, Leith ID, Sheppard LJ. Response of enchytraeid worm populations to different forms of nitrogen (ammonia, ammonium, and nitrate) deposition. Soil Org. 2022;81(2):225–236. Accessed July 5, 2025. https://www.soil-organisms.org/index.php/SO/article/view/198