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Pb > Mn > Cu > Ni > Cd. The results showed that Mn, Ni, Cd and Cu concentrations in the grain and straw of wheat and maize plants (except Cu in wheat straw) being within the normal range. On the other hand Fe and Pb concentration in the grain and straw of wheat and maize plants and Cu in maize straw are being within the critical concentrations range of these elements in plants.
7- Application of different composted improved some soil physical properties such as bulk density and aggregate parameters.
8- Economical evaluation was done by calculating the benefit to cost ratio B/C parameter. The highest profit was obtained when soil was mixed with composted sawdust activated by compost.]]>
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