01833naa a2200205 a 450000100080000000500110000800800410001910000240006024500550008426000090013952013130014865000120146165000140147365000160148765000160150365300140151965300140153370000190154777300610156617862352013-08-21       1977    bl ---       0--  u    #d1 aJONES JUNIOR, J. B.  aAgricultural limebits solubility and composition.  c1977  aIt would be difficult to pinpoint a single factor influencing the reactivity of the agricultural limestones. And, it should also be remembered that the materials used in this study were finely ground, possibly biasing the results. Hoperfully only the rate of reactivity was influenced rather than the character of reaction. Lime reactivity measured in terms of effect on soil pH cannot easily be predicted on the basis of its Ca content. However, there is some justification to suggest that for the limestones used in this study, soil reactivity is related more specially to Mg content. This suiggests that many of these limestones are not pure dolomites but either mixtures of dolomite and calcite, or calcitic limestone in which Mg has intruded into the calcit molecular structure. Apparently, sufficient quantities of Mg may be released from many of these limestones to supply Mg crop requirements even when the Mg content in the limes is at the minimum level defined in the Georgia Limestone Law to be called "Dolomitic Limestone." The results obtained in this study would suggest that up to 10% of the Mg applied as limestone could be released into the soil solution and therefore be available to plants to satisfy their Mg requirement. However, field studies are needed to further evaluate this aspect.  aGeorgia  alimestone  aFertilidade  aSolo Ácido  aAcid soil  aFertility1 aPERKINS, H. F.  tGeorgia Agricultural Researchgv.19, n.1, p.31-34, 1977.