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Agronomist dictionary

Short and clear definitions of agronomic terms: soil cultivation, sowing, nutrition, plant protection, machinery, and crop storage.

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Terms in section: 11

N

Nutrition and fertilizers

Nitrification

The biological process of oxidizing ammonia nitrogen by soil bacteria into nitrate, which is the form most easily absorbed by plants.

Nutrition and fertilizers

Nitrogen fixation

The process by which atmospheric nitrogen is converted into ammonia or related nitrogenous compounds that plants can use.

Nutrition and fertilizers

Nitrogen immobilization

The process by which soil microorganisms absorb mineral nitrogen, temporarily making it unavailable for uptake by crop plants.

Nutrition and fertilizers

Nitrogen top dressing

Nitrogen top dressing is the application of nitrogen fertilizers during the growing season to promote healthy vegetative growth and increase crop yields.

Nutrition and fertilizers

Nitrogen-fixing bacteria

Microorganisms capable of transforming atmospheric nitrogen into a form that plants can easily absorb and use for growth.

Nutrition and fertilizers

NPK complex

This is a balanced combination of the three primary macronutrients — nitrogen, phosphorus, and potassium — essential for optimal plant growth and crop yield.

Nutrition and fertilizers

Nutrient balance

This is the net difference between the amount of nutrients applied to the soil through fertilizers and the amount removed from the field by crop harvest.

Nutrition and fertilizers

Nutrient deficiency

A condition in which a plant does not receive sufficient essential nutrients from the soil or fertilizers to support its healthy growth and development.

Nutrition and fertilizers

Nutrient uptake

This is the amount of mineral nutrients that crops absorb from the soil and fertilizers to produce their total biomass and yield.

Nutrition and fertilizers

Nutrient Use Efficiency

This is a measure of the proportion of nutrients actually taken up by the plant from applied fertilizers relative to the total amount applied.