Effects of Nitrogen Fertilizer Management on Alfalfa Plant Nitrogen Concentration The nitrogen concentration in alfalfa plants showed a decreasing trend as the growth period progressed ( Figure 2 ), indicating a nitrogen dilution effect during biomass accumulation.
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Optimizing Management of Alfalfa (<i>Medicago sativa</i> L.) Nitrogen Fertilizer Based on Critical Nitrogen Concentration Dilution Curve Model.
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The coefficients of determination (R 2 ) under both urea and CRU treatments reached highly significant levels, indicating a strong fit between NNI and RY and suggesting that NNI can be effectively used to predict nitrogen nutritional status in alfalfa.