Experiment: Comparing leaching in soils

////Experiment: Comparing leaching in soils

Experiment: Comparing leaching in soils

Leach the soil

Leach the soil

ZIMSEC O Level Combined Science Notes: Comparing leaching in soils

Materials: soil samples, distilled water, burners, 3 beakers, measuring cylinders, cotton wool, filter funnel

Method

Boil the filtrate

Boil the filtrate

  1. Set up the samples as shown in the diagram above
  2. Pour the same amount of distilled water through each soil sample
  3. Collect the filtrate
  4. Evapourate the filtrate completely
  5. Compare the amount residue left behind by each filtrate

Results

A solid residue is left behind

A solid residue is left behind

  • The amount of filtrate left by sand soils was the largest when compared to the one left by clay soils
  • Loamy soils left a filtrate that is between that of sandy and clay soils in terms of size

Conclusion

  • Leaching is greater in sandy soils and the least in clay soil
  • The leaching rate of loam soils is in-between that of sand and clay soils

NB This assumes the soils have the roughly the same amount of minerals in them to begin with, sometimes misleading results can obtained if soil samples are collected from outside because sandy soils would have started with less dissolved minerals to begin with since they leach easily

To access more topics go to the Combined Science Notes page.

By |2017-01-17T11:15:24+00:00February 27th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|Comments Off on Experiment: Comparing leaching in soils

About the Author:

He holds an Honours in Accountancy degree from the University of Zimbabwe. He is passionate about technology and its practical application in today's world.
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