Losses of nitrogen from urine on soils from south western Australia

摘要: Nitrogen loss from sheep urine was measured on two soil types under different surface cover and moisture conditions at a location with high summer temperatures. Some of the factors influencing nitrogen were studied in pots lysimeters. Grass plants utilized almost half applied urine. Loss by volatilization leaching considerably less grass than bare soil. When during hot months, there large losses (50 per cent) even cover. During summer, rewetting patches to simulate rainfall increased amount lost. Eighty cent lost after three wettings. Frequency wetting more important volume water applied. Urine application markedly pH soils over long period.