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Let us consider some examples of sampling. In particular, we will examine soil sampling and dieback disease sampling applications. Soil sampling We want to know the quality of soils within a particular region so that we can ascertain what is required to ensure adequate vegetative growth (ie. for cropping, grazing, recreational, etc. purposes). One measure of soil quality is its pH content. We can obtain soil samples from throughout the region, measure the pH level of each sample, link it to the geographic location, build a soil surface and map it to examine the pH variation throughout the region. Dieback sampling
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Dieback
is a fungal root disease that has been introduced to Australia.
It attacks the root systems of some plant species, affecting the
ability of the plant to uptake nutrients and water from the soil-
it can kill the infected plant. Not all plant species are affected,
but, Banksias, Eucalypts and Heaths can be susceptible to the disease.
Government authorities have put measures in place for the assessment
and control of this disease. The extent of the disease can be measured
using surveying and spatial sampling techniques to obtain root samples
followed by analysis of the samples in a controlled laboratory.|
Note to remember... We will come back to these applications as you continue your virtual sampling excursion. |
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To Do... As you read through these applications, think about what may be involved in carrying out a sampling exercise. In particular, consider:
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