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 slightly acid in the A1 is mildly alkaline at 7.7 _h20 which is higher than desired. The cation exchange capacity (CEC) which is a measure of nutrient retention is low throughout the soil profile ranging in values from 4.1 meq/100g in the A2 horizon to 9.6 meq/100g in the B21 horizon. The organic carbon content in the A1 horizon is only moderate at 1.4 %, and extremely low in all other soil horizons. The topsoil A1 horizon is moderately saline (EC1:5 0.31 dS/m equal to 4.3 ECe dS/m), and all lower soil horizons are slightly saline. All soil horizons are strongly sodic (ESP>5) including the A1 and A2 horizons which is unusual.