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This article in AJ

  1. Vol. 59 No. 3, p. 285-286
    Received: Oct 5, 1966

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Commonly Occuring Errors in Inter-Pretations of Yield Results from Single-Rate Nutrient Comparisons1

  1. G. L. Terman2



The use of single-rate nutrient comparisons and determination of effectiveness based on relative yields or yield increases over no applied nutrient result in ratings which are commonly too high. This arises from the application of such linear response models to curvilinear yield response with increasing amounts of applied nutrient. Yield results obtained only on the flat portion of a complete response curve are usually not meaningful for comparing nutrient sources.

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