Chemical Characteristics Flashcards
What is pH?
pH is a measure of the acidity or alkalinity of the soil
How is pH measured?
Obtaining a soil sample and mixing universal indicator into the soil with barium sulfate and the colour will change
How does pH affect plant production?
Plant growth and yields, Nutrient availability etc.
How can acidity be reduced?
Application of Lime
How can acidity be increased?
Addition of fertilisers to the soil, which are acidic
What is IEC?
The ability of the soil to hold and exchange positive ions. The higher the IEC, generally the more fertile the soil is
How is this characteristic (IEC) affected?
The texture of the soil, Organic matter content and pH of the soil
How is IEC measured?
Electrical probes or data loggers can determine the level of nutrients within the soil
How does IEC affect plant production?
If IEC declines, then the ability of the soil to exchange nutrients is reduced
How can IEC be modified?
Lime can be applied to correct the pH
