Patterns of ammonia volatilization from a forest soil

Ammonia volatilization from urea-treated soils was estimated under field and laboratory conditions. Acid-washed filter papers were hung in the air in a spruce stand treated with N and P fertilizers in a factorial design. In the laboratory, moss sods were incubated to quantify ammonia volatilization. Ammonia volatilization increased with the level of N applied and more ammonia was absorbed by filter papers at 0.6 m above the ground than those at...