The P/Mn, K/Ca, K/Mg, K/Mn, Ca/Mn, Mg/P, Mg/Mn, Fe/Mn, and Zn/Mn ratios reached highly significant levels. 3.3.2 DRIS indexes and nutrient requirements for Paeonia ostii in low-yielding group The DRIS index is a quantitative measure that indicates the intensity of crop demand for a given element.
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Foliar nutrient diagnosis in <i>Paeonia ostii</i>: an integrated DRIS-RN-CND approach for the fruit expansion stage.
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