The effect of gypsum on cation exchange in two red duplex soils
作者： RSB Greene , GW Ford
DOI: 10.1071/SR9850061
关键词:
摘要: Gypsum at rates of up to 15 t ha-1 was applied the surface 10 cm two red duplex soils in northern Victoria. At both sites, approximately five years after application, following changes soil properties were established: 1. Only when gypsum exchangeable sodium upper 25 significantly decreased. 2. Exchangeable magnesium not decreased depths greater than cm. After only treatments still contained some undissolved A horizon. Of that had dissolved, 53% been involved exchange. This represented an efficiency exchange 26-34%, based on ratio replaced calcium dissolved. sites over this five-year period, mean solubility from treatment 120-130 mm rainfall per gypsum.
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