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Does cover help to
reduce erosion?
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Do plants grow better in
topsoil or subsoil?
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How deep do plant roots
grow to?
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How quickly do acid
sulfate soils produce acid?
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Will plants grow in acid
sulfate soils?
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Does soil texture affect
plant growth?
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Does waterlogging affect
plant growth?
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Does compaction affect
plant growth?
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Does gypsum help sodic
soils?
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Does dispersion affect
plant growth?
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Do trees control soil erosion?
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Do organic fertilisers
work better than mineral fertilisers?
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At what pH do plants grow
best?
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Does soil water content
affect the total root mass of a plant?
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What affect does adding
lime to soil have on pH?
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How much lime do I need
to add to an acid soil to achieve plant growth?
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Does growing a plant in
soil change the soil's pH?
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Is soil alive? What organisms can you find in soil?
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How do surface mulches
affect evaporation of water from soils?
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How do surface mulches
affect soil temperatures in the plant root zone?
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What happens to the
surface temperature of soils throughout the day and night in dry conditions and
when it rains?
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What is the temperature
profile above a cultivated bare soil and a soil with a standing crop?
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How deep does irrigation
water penetrate into soils when the soil is dry and when it is wet?
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How do you measure water
tables in soils?
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How can farmers manage
erosion?
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How can landholders
manage waterlogging?
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How can farmers maximise
crop yield?
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