Earth science

Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Soil science

nutrient toxicity

Earth science; Soil science

Quality, state or degree of harmful effect from an essential nutrient in sufficient concentrations in the plant.

fulvic acid fraction

Earth science; Soil science

Fraction of soil organic matter that is soluble in both alkali and dilute acid.

continuity equation

Earth science; Soil science

An equation representing the three-dimensional flow system that accounts for conservation of mass or energy.

aquents

Earth science; Soil science

Entisols that are saturated with water for periods long enough to limit their use for most crops other than pasture unless they are artificially drained. Aquents have low chromas ...

muck soil

Earth science; Soil science

An organic soil in which the plant residues have been altered beyond recognition. The sum of the thicknesses of organic layers is usually greater than the sum of the thicknesses ...

acidic cations

Earth science; Soil science

Cations that, on being added to water, undergo hydrolysis resulting in an acidic solution. Hydrated acidic cations donate protons to water to form hydronium ions (H3O+) and thus ...