The Soil: Quiz
Read the following statement and question then, based on what you have learnt from the previous screens,
select the correct answer...
Drainage and aeration of heavy clay soils can be immediately improved by the incorporation of gypsum (a hydrated form of calcium sulphate).
Without having to understand the chemistry involved, what physical changes to the soil due to the addition of gypsum might produce this improvement?
the gypsum improves the soil texture by increasing the size of the soil particles
the gypsum improves the soil structure by increasing the size of the soil particles
the gypsum improves the soil structure by increasing the degree of aggregation of soil particles
try again
Yes, the gypsum causes the soil to aggregate, introducing larger pore spaces which improve aeration and speeds water movement (i.e. drainage).
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