Suppression of the Infection of Jarrah Roots by Phytophthora cinnamomi With Application of Calcium Carbonate

Abstract

Application of calcium carbonate to an acid sand (pH 4.5 in 1/5 0 . 01 M calcium chloride), which increased the soil pH to 6.7, increased the fresh weight of tops of jarrah seedlings and decreased the fresh weight of roots. Calcium carbonate markedly increased the proportion of fine roots and almost suppressed infection of jarrah roots by P. cinnamomi.