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 topsoil at 6.5 _h20 which is maintained to a depth of 40 cm before acidity increases with depth. The cation exchange capacity throughout the soil is low at only 5.19 meq/100g in the topsoil, and 5.29 meq/100g to 5.9 meq/100g in the B22 and B23. This indicates the soil has very low ability to hold and supply nutrients to the tree. The extremely low CEC and organic carbon in the B21 is presumably due to the perched waterlogging and leaching of nutrients from this soil layer. Despite the low CEC, the organic carbon content of the A1 horizon (topsoil) is high at 2.47 %. The soil profile is not saline or sodic. Potassium and Sulphur are noted to be low.