Soil Chemistry Overview

This data reflects both the natural elemental composition at the site and the historical influence of nutrient management. Some soil properties such as organic carbon indicate overall soil health, whilst other such as Sodicity, Aluminium and salinity may indicate constraints to root growth and soil water extraction. Comparison between sites of the same soil type will help better understand the difference between these two influencing factors. High or low levels of some nutrients may indicate that some changes in nutrient management may be necessary and we suggest that you contact your local agronomist for their recommendations.

Soil pH in the A1 and A21 horizons are mildly alkaline at 7.4_h20 and 7.5 _h20, which trend to acid in the subsoil. The cation exchange capacity in the A1 horizon is low at only 6.5 meq/100g and 2.3 meq/100g in the A21 horizon. This indicates the topsoil layers have little ability to hold and supply nutrients to the tree. The organic carbon content in the A1 horizon at 1.0 % is low, and extremely low in all other soil layers. The topsoil horizons are not saline, however the B2c horizon is classed as moderately saline. A1 horizon is not sodic but the A21, B2c andB22 horizons are all moderately to strongly sodic.