Mixture of Sandy Soil and Arvo-Humus as Improved Media for Geranium Plants

Abstract

Arvo-Humus is a commercial product made of conifer bark, to which macro- and micro-nutrients were added during processing. Increments ranging from 20% to 80% of Avro-Humus were mixed with sand to achieve a better growing media for geranium plants. Although the most effective increment was 40%, yet economically, a mixture of 20% Arvo-Humus and 80% sand could be recommended, since the beneficial effect of the two treatments on plant height, leaf diameter and fresh weight of tops was almost the same.