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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10075

Title: Amidase and Urease Activity in Soil as Affected by Sludge, Salinity and Wetting and Drying Cycles
Authors: A. M. Gomah
S. I. Al Nahidh
H. A. Amer
Issue Date: 1990
Abstract: Three incubation experiments were carried out to assess the effect of different levels of sludge, salinity and of different wetting and drying cycles on amidase and urease activity in a calcareous silt loam soil. Both amidase and urease activities were largely increased with the increase in the amount of sludge applied. The addition of NH+4 -N with sludge slightly reduced both activities. Addition of increasing amounts of 1:1 NaCl : CaCl2 salt mixture increasingly reduced the soil activities of amidase and urease . This effect was less severe in sludge amended soil. The data also showed that drying of either unamended or sludge amended soil cause a marked drop in amidase and urease activity. Rewetting increased both enzyme activities.
URI: http://hdl.handle.net/123456789/10075
Appears in Collections:College of Foods And Agricultural Science

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