According to the tuber expansion parameters ( Table 2 ), the initial growth potential of the tubers (R 0 ) exhibited a decreasing trend followed by an increasing trend.
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Improving Tuber Yield of Tiger Nut (<i>Cyperus esculentus</i> L.) through Nitrogen Fertilization in Sandy Farmland.
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A significant or highly significant positive correlation was observed between the tuber expansion rate and both the yield and NUE (R 2 = 0.654*~973**).
In low nitrogen treatments (N0 and N100), the N A demonstrated a decreasing trend over time, while in high nitrogen treatments (N300 and N400), it showcased an ascending and then descending pattern, reaching its zenith on the 30th day at 3.78–5.63 μg cm –2 .