Fertilizer Terminology

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Bulk blending

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A method of mixing different granular fertilizers to create a custom blend.

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Complete fertilizers

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Fertilizers that contain all three primary nutrients: nitrogen, phosphorus, and potassium.

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Fertilizer

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A substance added to soil to enhance the growth of plants by providing essential nutrients.

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Fertilizer analysis

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The composition of a fertilizer, usually expressed as percentages of nitrogen, phosphorus, and potassium.

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Fertilizer grade

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The guaranteed minimum percentage of nutrients in a fertilizer, typically shown as N-P-K.

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Fertilizer ratio

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The ratio of the primary nutrients (N-P-K) in a fertilizer.

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Fillers

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Materials added to fertilizers to make up the bulk, which do not contribute nutrients.

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Inorganic fertilizers

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Fertilizers derived from mineral sources, often chemically processed.

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Mixed fertilizers

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Fertilizers that contain a combination of two or more nutrient elements.

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Nutrient management plan

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A strategy for applying fertilizers and other soil amendments to optimize plant growth and minimize environmental impact.