Graphed DataSets
Year Soil Texture Rainfall Management Group Land Use Sample Size
All All All All All 98
Graph Additional DataSets
Phosphorus Buffering Index (0 - 10 cm) Overview

Phosphorus Buffering Index (PBI) is used in conjunction with the Colwell Phosphorus measurement and gives an interpretation of a soils ability to “lock-up” P. Soils with a high PBI will quickly bind P to “exchange sites” and make it unavailable for plant uptake. Conversely, soils with a low PBI will lock up only small amounts of P, leaving the majority of fertiliser applied P available for plant uptake.

Managing high PBI soils generally involves applying higher rates of P fertiliser. Doing this over many years will gradually fill more and more exchange sites, therefore leaving more fertiliser P available for the growing crop.

In some Australian soils, where PBI is particularly low, phosphorus leaching can occur.

Choose a Soil Quality indicator from one of the three tabs below to examine grouped data.

Wheatbelt NRM Soil Acidity Data

To view additional data

View Soil Acidity Data
Fact Sheets Related To
Phosphorus Buffering Index (0 - 10 cm)