Research Article
Enhanced Efficiency Liquid Nitrogen Fertilizer Management for Corn Production
Table 2
The ANOVA table for corn plant heights at 84 and 168 kg·N·ha−1.
| Source of variation | df | 27 May | 1 June | 8 June | 15 June | 22 June | 30 June | 6 July | Pr > F | Pr > F | Pr > F | Pr > F | Pr > F | Pr > F | Pr > F |
| N application rate = 84 kg·N·ha−1 | Year | 2 | <0.0001‡ | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | Timing | 1 | 0.0909 | 0.2542 | 0.0502 | 0.0080 | 0.1304 | 0.4199 | 0.1464 | Year × timing | 2 | 0.1699 | 0.1770 | 0.0843 | 0.0021 | 0.0250 | 0.0054 | <0.0001 | SorcPlac† | 4 | 0.0878 | 0.0060 | 0.1925 | 0.1535 | 0.9851 | 0.0337 | 0.2099 | Year × SorcPlac | 8 | 0.5414 | 0.0543 | 0.1082 | 0.0937 | 0.7844 | 0.0257 | 0.1137 | SorcPlac × timing | 4 | 0.2358 | 0.1852 | 0.3019 | 0.2454 | 0.1515 | 0.2543 | 0.0973 | Year × SorcPlac × timing | 8 | 0.8873 | 0.1855 | 0.5453 | 0.6266 | 0.9517 | 0.9865 | 0.4783 |
| N application rate = 168 kg·N·ha−1 | Year | 2 | <0.0001‡ | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | <0.0001 | Timing | 1 | 0.0111 | 0.0001 | 0.3070 | 0.0071 | 0.0224 | 0.1618 | 0.1267 | Year × timing | 2 | 0.0010 | <0.0001 | 0.1474 | 0.0030 | 0.0198 | 0.0207 | <0.0001 | SorcPlac† | 4 | 0.0001 | 0.0909 | 0.0113 | 0.0345 | 0.3286 | 0.1776 | 0.1033 | Year × SorcPlac | 8 | 0.0473 | 0.0759 | 0.0001 | 0.1302 | 0.3409 | 0.2188 | 0.0950 | SorcPlac × timing | 4 | 0.4751 | 0.0007 | 0.0361 | 0.1839 | 0.3107 | 0.1450 | 0.2826 | Year × SorcPlac × timing | 8 | 0.3364 | 0.0495 | 0.2730 | 0.5143 | 0.7584 | 0.4955 | 0.7226 |
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†Abbreviations: SorcPlac, source/placement. ‡Numbers in bold represent Fisher’s protected least significant difference at . |