Soil test interpretations have been developed so that for most fields testing "high" in a nutrient,addition of that nutrient will not increase yield enough to more than pay for the cost of applying the nutrient.

Question

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Soil test interpretations are designed to provide guidance on the optimal level of nutrients in the soil for plant growth. If a soil tests "high" in a particular nutrient, it means that there is already enough of that nutrient present in the soil to support optimal plant growth. Adding more of that nutrient through fertilization will not increase yield enough to cover the cost of the additional fertilizer. Therefore, it is not recommended to apply more of that nutrient in such cases.

Soil Test Interpretations Have Been Developed So That for Most