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 is ideal being slightly acid to neutral in the topsoil and moderately acid in the subsoil. The cation exchange capacity at 4.43 – 6.03 meq/100g in the A12 and A11 horizons which is low to moderate, but not unexpected. This indicates the soil has limited ability to hold and supply nutrients to the tree. The calcium to magnesium ratio is also low at 1.66 in the A11 horizon. Despite the low CEC, the organic carbon content of the A11 horizon is high at 2.63 % and 2.15 % in the A12 horizon. The soil profile is not saline and is not sodic. Potassium is very high throughout the soil profile. Phosphorous is moderate to high.