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 two topsoil horizons is 7.3 _h20 which is classed as neutral, trending to slightly acid in the subsoil. The high clay content throughout the soil profile has resulted in high cation exchange capacity in the A11, A12 and B2 horizons at 29 meq/100g to 32 meq/100g, in which calcium accounts for more than 60% of all exchangeable cations in the A horizons. The A11 and A12 horizons have very high organic carbon contents at 3.2 %, whilst the B2 horizon at 34-60 cm depth also has high organic carbon content at 2.5 %. The soil profile is not saline or sodic, with the exception of the B3 horizon which has an ESP of 7.7 %. Phosphorous is noted to be high in the A horizons, while Sulphur is noted to be high in the B horizons.