Zinc status of soils in Shahdadpur Sindh Pakistan
2008
Qurban Ali Panhwar | Radziah, O., Putra Malaysia Univ. (UPM), 43400 UPM Serdang, Selangor (Malaysia). Faculty of Agriculture. Dept. of Land Management.
A study was conducted to determine the zinc status of soils in Shahdadpur Sindh Pakistan. SOil samples from 50 sites (Dehs) were taken at the depth of 0-15 and 15-45 cm an? were analyzed for zinc content and physico-chemical properties. It revealed that the SOil texture of the various sites appeared as heavy to medium. The EC (1:5) ranged from 0:16 to 9.96 dS/m at 0-15 cm and 0.15 to 4.74 dS/m at 15-45 cm depths. Soil pH was higher at 15-45 cm depth with mean pH values of 7.93 and 8.14 at 0-15 and 15-45 cm soil depths,respectivelY.The soils were poor in organic matter content, 0.93% in 0-15 cm and 0.68% in 15-45 cm soil depth. The CaC03 content ranged from 10% to 18% and the soils were identified as calcareous. The zinc content of the soil varied from 0.35 to 3.07 mg/kg and 0.23 to 0.86 mg/kg at 0-15 and 15-45 cm soil depths respectively. The categorization of the total 50 SOil samples for thiS element at various depths, showed that 34 sites we re low (0.9 mg/kg), 8 were marginal (0.9-1.5 mg/kg) and remaining 8 locations were adequate ( 1.5 mg/kg) in Zn concentration. The correlation coefficient studies for Zn showed significantly negative relationship with pH and non-significant relationship was found With OM and CaC03_ The sol1s, of Shahdadpur were highly calcareous and the high pH inversely affected the availability of Zn.
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