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Mn> Fe.
Available P, Fe, and Mn increased by increasing P fertilizer levels from P1 to P3, while available Zn increased by increasing P fertilizer levels from P1 to P2 but at P3 it decreased.
[U+ Zn (F)] treatment gave the highest available P, Fe, and Mn, while the highest available Zn was obtained by [Zn20(s)] treatment.]]>
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El-Salam canal-1 (7 Nile water: 1 drainage water) > Bahr El-Bakar drain water. Total concentrations of Zn, Cu, Pb, Cd, Ni and Se in the surface layer of studied soils ranged from 73.9 to 80.4, 50.8 to 55.1, 26.5 to 41.1, 0.66 to 1.5, 53.8 to 60.8 and 2.23 to 6.0 mg kg-1, respectively; whereas As was not found in a detectable concentration. Also, concentrations of the DTPA-extractable Zn, Cu, Pb, Cd and Se ranged from 0.82 to 1.25, 3.6 to 5.85, 0.53 to 0.82, 0.006 to 0.015 and 0. 043 to 0.12 mg kg-1 soil, respectively. Whereas Ni and As were not found in detectable concentrations. Total accumulations of the concerned heavy metals in the soils were less than the maximum permissible loadings according to USEPA-503 regulations. Total content of Zn, Cu, Se, Pb and As in shoots and roots of the grown plants were, to a great extent, in the normal range. However total content of both Cd and Ni were slightly higher. Generally, the sequence of heavy metals in the studied plant shoots and roots according to their concentrations was as follows: Zn≥ Cu> Ni> Pb> Se> Cd>As. Total concentrations of Zn, Cu, and Ni in all plant shoots were mostly higher than in roots; whereas concentrations of As and Se in both shoots and roots were, more or less, the same. On the other hand, total contents of Pb and Cd in the roots were higher than in shoots.]]>
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