What are the two components of soil acidity?

What are the two components of soil acidity?

• A. Active and exchangeable acidity
• B. Organic and inorganic acidity
• C. Surface and subsurface acidity
• D. Acute and chronic acidity

Answer: (A)

The two components of soil acidity are active and exchangeable acidity. Active acidity refers to the concentration of hydrogen ions (H+) in the soil solution, which directly influences the pH level and the immediate availability of nutrients to plants. Exchangeable acidity involves hydrogen ions that are adsorbed onto the soil's cation exchange sites; these ions can be released into the soil solution, contributing to the overall acidity when conditions allow for their exchange. Understanding both active and exchangeable acidity is crucial for effective soil management, as they together determine the soil's acidity level and its effects on plant growth. The other options—organic and inorganic acidity, surface and subsurface acidity, as well as acute and chronic acidity—are not standard terms used to describe the components of soil acidity in a typical nutrient management context. Each of these options may pertain to various aspects of soil science or related fields but does not accurately capture the accepted definitions and components of soil acidity.

The two components of soil acidity are active and exchangeable acidity. Active acidity refers to the concentration of hydrogen ions (H+) in the soil solution, which directly influences the pH level and the immediate availability of nutrients to plants. Exchangeable acidity involves hydrogen ions that are adsorbed onto the soil's cation exchange sites; these ions can be released into the soil solution, contributing to the overall acidity when conditions allow for their exchange. Understanding both active and exchangeable acidity is crucial for effective soil management, as they together determine the soil's acidity level and its effects on plant growth.

The other options—organic and inorganic acidity, surface and subsurface acidity, as well as acute and chronic acidity—are not standard terms used to describe the components of soil acidity in a typical nutrient management context. Each of these options may pertain to various aspects of soil science or related fields but does not accurately capture the accepted definitions and components of soil acidity.