beaker graduated cylinder
E. Make the Just Passing Through (JPT) bottles (use clear, wide-neck
1-liter bottles and follow the instructions in the Just Passing
Through Learning Activity in the teacher's guide). The difference
with what I do is that I put the bottles into 500 mL graduated
cylinders instead of beakers. That way, they stand higher and
you get a better idea of how much water has filtered through because
it's easier to measure.
If you have a high clay content horizon, use that horizon for
your clay soil and dry at least 2 kilograms of that soil. If you
don't have a high clay content horizon, then purchase 100% clay
non-scented all natural kitty litter. That kind of kitty litter
is often a clay like Bentonite and will work well for the activity.
For sand, if you have a high sand content horizon, grab about
a liter bag's worth of that soil and use it for JPT. If not, then
get some sandbox sand and use it for the learning activity.
For your high organic content soil, use potting soil.
Put the soils into the drying oven to dry so that they can then
be used for JPT. Once they are dried, you'll place them in plastic
bags marked JPT Sand, JPT Clay, JPT Organic.
Soil Temperature is taught within the Atmosphere protocols so
get the Atmosphere trainer the temperature probes, the gutter
spikes, the wood blocks (or PVC pipes) and the Soil Temp viewgraphs.
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