Author: DM Wheeler, Agresearch
Olsen P data extracted from database of soil fertility data obtained from commercial soil testing lab for the period 1988-2001. Samples were categorised according to land use or soil group (sedimentary, volcanic, pumice, peat).
Olsen P measurements lend themselves to monitoring change over time. This report gives trends in Olsen P levels over time for different land use and soil types for the Waikato region.
Trends In Olsen P Test Over Time For The Waikato Region
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|2.2 Classification of records||2|
|3.1 Olsen P over time||4|
|3.2 Distribution of samples||6|