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. 2024 Mar 14;13(6):844. doi: 10.3390/plants13060844

Figure 1.

Figure 1

Fertilization effects on leaf (a) nitrogen (N), (b) phosphorus (P), and (c) potassium (K) contents and grain (d) nitrogen (N), (e) phosphorus (P), and (f) potassium (K) contents of four maize cultivars over two years. Bars are means of four replicates and contain standard errors of means (n = 4). Each pair of bars with asterisk (*) show significant differences between years at p < 0.05. T1: P60K60; T2: P60K60 + Nmin spring; T3: P60K60 + N40autumn + Nmin spring; T4: P60K60 + N60spring; T5: P60K60 + N100spring; T6: P60K60 + N40autumn + N60spring + Zn; T7: P60K60 + N40autumn + N80spring + Zn; T8: P60K60 + N160spring + Zn.