Research Article

Soil Application of Tannery Land Plaster: Effects on Nitrogen Mineralization and Soil Biochemical Properties

Table 3

Results of the F-test from an overall ANOVA for extractable NH4+-N, extractable NO3-N, protease activity, respiration rate, microbial biomass, and extractable Cr.

ParameterSoilFertilization rateSoil type fertilization rate
Control versus 220Control versus 440220 versus 440

Extractable NH4+-Nnsns<0.05<0.05ns*
Extractable NO3-Nns<0.05<0.05<0.05ns
Protease activity<0.05<0.05<0.05<0.05ns
Respiration ratens<0.05<0.05<0.05ns
Microbial biomass<0.05<0.05<0.05nsns
Extractable Crns<0.05<0.05<0.05ns

*ns: not significant at .