Vietnam or Thailand? Vote for the TOP Country of the Week!
Want to type faster? Practice with a typing test or have fun with typing games!
Updated: October 13, 2026
Nitrification is most rapid in darkness; and in the case of solutions, exposure to strong light may cause nitrification to cease altogether. The presence of oxygen is of course essential. A thin layer of solution will nitrify sooner than a deep layer, owing to the larger proportion of oxygen available. The influence of depth of fluid is most conspicuous in the case of strong solutions.