Abstract
Abstract The carbonate content in the agricultural soils is very important, and sometimes causes a critical problems regarding to the plant nutrition. So, the information about the soil carbonate content should be noted. The calcimeter method is simple and convenient method has been to give reliable estimates of carbonate in a variety of soil samples. Thus, the objective of this work is to investigate a procedure based an estimation of carbonate, using long and short reaction time. Calcimeter apparatus was used to determine the dissolution kinetics of calcium carbonate in twelve different Hungarian soil types using nonselective acid reagent HCI of 10%. Three processes of carbonate dissolution were investigated under laboratory conditions, and the processes were examined by a computer program, given the followings: one very fast reaction (Q a constant parameter), another faster (k1,Al) and a slower (k2,A2) first order kinetic reactions.