GROWTH DIFFERENCES, FERTILITY STATUS AND FOLIAR DEFICIENCY LEVELS OF SIX-YEAR-OLD <em>ACACIA</em> <em>MANGIUM</em> ON BRIS SOILS

Abstract

A study was made on the foliar elemental levels and growth differences in terms of height, diameter and basal area compositions between two soil types, and the foliar deficiency levels for elemental N, P, K, Ca, Mg, Mn and Zn. Based on ANOVA and Correlation Coefficient Analysis, it was shown that N uptake was somewhat independent of N in the soil. Significant relationships were also established for foliar K and Ca and their corresponding soil nutrients. Influence of site was significant for accumulated height but not for diameter and basal area. Nitrogen and K levels of 2.35% and 0.65% respectively in tin: foliage of A. mangium growing in Rhudua soils were considered non-limiting, while the K level of 0.4% in the foliage of acacia growing on Jambu soils was considered as a limiting level for growth.