Plant-Soil Interactions

Calcium is a secondary macronutrient, while nitrogen, phosphorus, and potassium are primary macronutrients essential for plant growth.

Absorption is the process by which plants take in water and nutrients from the soil through their roots.

Sandy soil has large pore spaces, allowing for good drainage and aeration, which promotes root growth.

Mycorrhizae is a mutually beneficial relationship between plants and fungi, where the fungus helps the plant absorb nutrients from the soil, while the plant provides the fungus with carbohydrates.

Nitrogen fixation is the process by which bacteria convert atmospheric nitrogen into a form usable by plants, such as nitrates and ammonium.

Most plants thrive in slightly acidic to neutral soil pH, typically ranging from 6.0 to 7.0.

Decomposition is the process by which organic matter in the soil is broken down into simpler compounds by microorganisms.

The O horizon is the uppermost soil horizon, composed of organic matter and is typically darker in color due to the presence of humus.

Water-holding capacity refers to the ability of soil to hold and release water for plant use.

Mineralization is the process by which nutrients are released from organic matter into a form usable by plants.

Clay soil has small pore spaces, resulting in poor drainage but high water-holding capacity.

Denitrification is the process by which bacteria convert nitrates into nitrogen gas, releasing it into the atmosphere.

Nitrification is the process by which bacteria convert ammonium into nitrates.

The C horizon is the layer of soil that is formed from the weathering of parent rock.

Transpiration is the process by which plants release water vapor into the atmosphere through their leaves.