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 acid in the topsoil at 5.4 _h20 trending to moderately to strongly acid with depth. The cation exchange capacity, which is a measure of the soils ability to retain and supply nutrients is very low in all soil horizons. Despite the low CEC the carbon content of the A11 horizon is very high at 3.36 %, and 2.55 % in the A12 horizon. This level of organic matter is considered high, and would normally be associated with much higher CEC. The soil profile is not saline, and not sodic in the A11 and A12 horizons. Technically the B2 horizon is classed as sodic as the ESP is 6.25 meq/100g, however given the CEC is only 1.60 meq/100g, the validity of this classification is questioned. Potassium is noted to be very high to excessive in the A11 and A12 horizons, whilst Phosphorous is excessive in the A11 horizon and high in the A12 horizon.