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This article in AJ

  1. Vol. 64 No. 3, p. 336-338
    Received: Sept 6, 1971

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Periodic Changes in the Ionic Concentrations of Some Submerged Soils of Bihar1

  1. D Biswas,
  2. J. D. Naphade and
  3. S. P. Dhua2



The investigation was carried out under laboratory conditions to study the chemistry of submerged soils of Bihar to help in assessing their potentialities in meeting the nutritional requirements of the rice plant (Oryza sativa L.). The soils were kept at 1:1.5 soil:water ratio and analyzed periodically for pH, electrical conductivity, soluble NH4 +, Fe++, Mn++, P, Na+ K+, Ca++, CO3=, HCO3, and Cl on the 15th, 30th, 45th, and 60th day. The results show differential release of these nutrients in different soils with time. While the pH of acidic soils increased, that of alkaline soils decreased with the time of submergence. The pH of all soils fell between 6.50 and 8.50 on the 60th day. In general the peak values of Mn++ and CO3 = were noted on the 15th day, HCO3 and Cl on the 30th day, and that of NH4+ between the 30th and 45th day after submergence. Most of the soils appear to be inherently deficient in N, P, K, Fe++ etc. and a good response of rice to fertilizer applications may be expected.

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