GDHS Soil Testing




File of information below.




We will visit several different places around GDHS and determine which site has the best soil to grow plants in. DESCRIBE the site where you got your soil samples:
Site A -
Site B -
Site C -
Station A: Soil Texture – use the hand lens to describe the soil texture of your sample
Site A -
Site B -
Site C -
Station B: Soil Acidity – soil should be close to neutral (pH 7) for good soil quality
  1. From your soil sample, take a small amount of soil and place it in a clean beaker.
  2. Add a few drops of distilled water.
  3. Using pH paper, gently touch the soil so the paper gets wet.
  4. Record the pH.
  5. Throw away your soil as instructed. Clean your beaker.




Site A

Site B

Site C

pH







Station C: Soil Turbidity – soil should settle in under 10 minutes for good soil quality
  1. Fill a beaker half-full with tap water.
  2. Scoop some soil from your sample into the beaker. (about 2 scoops)
  3. Stir the soil sample into the water using a stirrer
  4. (if possible) Record how long it takes the soil to settle to the bottom of the beaker.
  5. Throw away your soil as instructed. Clean and put away your beaker.




Site A

Site B

Site C

Time








Water Content – soil should have a water % of more than 10 for good soil quality
  1. Using your clean beaker, record its mass using the mass balance.
  2. Add the rest of your soil sample to the beaker. Record the mass again.
  3. Your instructor will place your soil samples in the drying oven overnight to eliminate the water from your soil
  4. Mass the beaker again.
  5. Throw away your soil as instructed. Clean and put away your beaker.






Site A

Site B

Site C

1

Mass Beaker







2

Mass Beaker + Soil







3

Mass Beaker + Soil day 2







4

Mass Difference 1 & 2 (soil only)







5

Mass Difference 1 & 3 (soil after drying)







6

Mass Difference 4 & 5 (water in soil)







7

% water in soil








To calculate % water in soil: water in soil/soil only x 100%
Based on your observations above, which site had the highest quality soil?




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