A Note on the Fertilizer Ratio Concept

John Reuss, Sam Johnson III

Abstract


The concept of plant nutrient ratios has long been utilized by
agronomists and appears to be particularly prevalent in Pakistan.
Production experts often express concern that the nutrient ratios
utilized by the farmers are not optimum for a particular crop [4]. These
concerns are reflected in the press and are considered by those charged
with planning production and imports. Agronomists interested in plant
nutrients may thus find themselves designing experiments to determine
the optimum ratios of plant nutrients for different crops grown under
different conditions. For the sake of simplicity we will limit this
discussion to two nutrients, nitrogen and phosphorus and the resulting
N/P ratios. This is appropriate because these fertilizer elements are
the most widely used in Pakistan and crops often respond to their use.
However, combinations involving other nutrients or crop inputs are
subject to the same principles.

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DOI: https://doi.org/10.30541/v17i1pp.123-130

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