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A laboratory-based aerobic incubation was conducted to investigate nitrogen (N) isotopic fractionation related to nitrification in five agricultural soils after application of ammonium sulfate ((NH 4 ) 2 SO 4 ). The soil samples were collected from a subtropical barren land soil derived from granite (RGB), three subtropical upland soils derived from granite (RQU), Quaternary...
The effects on nitrification and acidification in three subtropical soils to which (NH 4 ) 2 SO 4 or urea had been added at rate of 250 mg N kg −1 was studied using laboratory-based incubations. The results indicated that NH 4+ input did not stimulate nitrification in a red forest soil, nor was there any soil acidification. Unlike red forest soil, (NH ...
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