Kinetics of nitrate reduction in submerged soils

The results of the nitrate reduction kinetics of laterite and alluvial soil s of West Bengal, under different treatments reveal that the NO3-N content in both the soils decreases with the time of submergence and follows an exp onential pattern indicating first order of reaction kinetics irrespective o f treatments. Also there is complete disappearance of NO3-N in both the soi ls due to starch application at the end of 14 days of: submergence, The rat e of NO3-N reduction is much higher in two soils treated with starch or nit rogen (KNO3 or Drilled urea) than that of the untreated soils resulting fro m the higher values of the velocity constants and shortening of half-life p eriod as well as changes in pH and E-h in the treated soils.