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- W2014796709 abstract "SUMMARY The effects of submerging sodic and alkaline soils on the kinetics of Zn2+ transformations were investigated. The soils were treated with 0-640 mg Zn/kg soil as ZnSO4. H 2 O and kept submerged under water in pots at 30–38 °C. The soil solution was analysed periodically up to 72 days for pH, electrical conductivity and Zn2+ ion. Soil pH decreased with increasing amounts of added Zn and with periods of submergence. The rate of decrease was rapid during the first 21 days of submergence but slow thereafter. Zinc concentration in the soil solution increased with the amounts added and decreased with the period of submergence; this decrease was more in the calcareous sodic soils than in other soils. The values of the expression pZn + 2pOH (Zn. hydroxide potential) showed that in submerged calcareous sodic soils, Zn concentration in the soil solution was regulated both by the Zn (OH)2—Zn2+(aq.) and ZnCO3 — Zn2+(aq.) systems up to 21 days (pZn + 2pOH = 16–17–5), and thereafter predominantly by ZnCO3–Zn2+(aq.) (pZn + 2pOH = 17–6–18–8) as a result of the buffering effect of soil carbonate equilibria. In slightly calcareous sodic and slightly calcareous alkaline soils, the soil solution Zn was controlled transitorily by the system: Zn(0H)2 — Zn2+(aq.) before 2–7 days (pZn + 2pOH = 16–0–17–5), ZnCO3–Zn2+(aq.) from 2–7 to 14–21 days (pZn + 2pOH = 17–5–18–8). Thereafter Zn–soil (unknown solid phases) – Zn=+(aq.) system controlled the Zn solubility (pZn+2pOH = 18–8–20–4)." @default.
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- W2014796709 date "1979-10-01" @default.
- W2014796709 modified "2023-09-25" @default.
- W2014796709 title "Kinetics of Zinc Transformation in Submerged Alkaline Soils in the Rice Growing Tracts of Punjab" @default.
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- W2014796709 doi "https://doi.org/10.1017/s0021859600038132" @default.
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