Table 2.
Summary statistics based on per unit area for the Old Era data set.
| Variable | N | Mean | Std Dev | Minimum | 25% Q | Median | 75% Q | Maximum |
|---|---|---|---|---|---|---|---|---|
| PDA | 281 | 50,316 | 18,506 | 22,660 | 33,991 | 53,000 | 65,745 | 111,940 |
| GrainNc | 214 | 1.50 | 0.30 | 0.61 | 1.30 | 1.51 | 1.72 | 2.16 |
| %PostN | 281 | 29.7 | 13.3 | –2.7 | 22.1 | 28.9 | 38.3 | 70.4 |
| %PostDM | 157 | 51.1 | 12.6 | –16.0 | 42.7 | 51.6 | 59.0 | 75.7 |
| NIE | 259 | 48.1 | 9.9 | 28.2 | 40.6 | 47.1 | 54.0 | 79.2 |
| NHI | 216 | 64.6 | 9.6 | 22.4 | 58.4 | 66.4 | 71.0 | 87.7 |
| HI | 174 | 50.8 | 8.9 | 18.3 | 44.7 | 49.9 | 56.6 | 76.5 |
| R1NCE | 156 | 67.9 | 22.1 | 39.0 | 52.9 | 60.2 | 72.9 | 138.1 |
| R6NCE | 156 | 96.8 | 21.4 | 44.6 | 82.5 | 90.4 | 111.1 | 155.1 |
| %GrainNPostN | 224 | 45.1 | 18.5 | 0.0 | 33.8 | 44.5 | 56.9 | 100.0 |
| %R1Remob | 216 | 49.4 | 13.6 | 7.6 | 41.8 | 50.0 | 59.4 | 87.0 |
| StoverNc | 133 | 0.66 | 0.27 | 0.20 | 0.49 | 0.64 | 0.77 | 2.41 |
| NNI | 161 | 0.96 | 0.24 | 0.33 | 0.83 | 1.00 | 1.13 | 1.34 |
| %PostStvDM | 139 | 13.4 | 19.8 | –38.0 | 0.2 | 12.7 | 25.4 | 60.6 |
| NRateA | 275 | 170.3 | 102.1 | 0.0 | 105.0 | 170.0 | 225.0 | 492.0 |
| R1NA | 281 | 113.8 | 41.6 | 21.0 | 86.4 | 112.0 | 137.3 | 235.0 |
| R6NA | 281 | 165.1 | 62.3 | 35.6 | 123.7 | 157.6 | 203.6 | 386.8 |
| GYA | 263 | 7853.2 | 2826.5 | 1206.5 | 5642.5 | 7696.9 | 9715.2 | 19300.0 |
| GrainNA | 224 | 104.0 | 41.2 | 10.3 | 74.5 | 101.3 | 127.6 | 266.0 |
| R1DMA | 161 | 7324.0 | 2273.9 | 2059.2 | 6110.0 | 6866.2 | 8225.4 | 15372.0 |
| R6DMA | 192 | 15966.1 | 5165.0 | 4257.8 | 12168.3 | 15263.7 | 19529.6 | 31820.0 |
| PostNA | 281 | 51.4 | 35.2 | 0.0 | 25.5 | 44.0 | 67.0 | 188.3 |
| PostDMA | 157 | 8246.9 | 4076.6 | –679.7 | 5071.6 | 7949.5 | 10000.0 | 21732.0 |
| RemobNA | 216 | 57.9 | 28.7 | 3.5 | 38.0 | 54.1 | 73.5 | 163.5 |
| StoverNA | 224 | 56.1 | 24.3 | 14.3 | 38.3 | 54.3 | 68.4 | 163.3 |
| StoverDMA | 182 | 9124.4 | 3183.8 | 2462.5 | 6854.8 | 8499.2 | 10774.0 | 19478.7 |
| ΔStoverA | 139 | 1333.0 | 2612.8 | –6467.1 | –18.6 | 833.7 | 2079.6 | 11380.7 |
Units in kg ha−1 are denoted with the subscript “A.” PD, Plant density; GrainNc, grain N concentration; %PostN, proportion of total N accumulated after silking; %PostDM, proportion of dry matter accumulated after silking; NIE, N internal efficiency; NHI, N harvest index; HI, harvest index; %GrainNPostN, proportion of grain N arising from post-silking N accumulation; %R1Remob, proportion of R1 N remobilized to the grain; StoverNc, stover N concentration; NNI, N Nutrition Index; %PostStvDM, percent change in stover dry weight from silking to maturity; Nrate, N rate applied; R1N, N accumulated at silking; R6N, N accumulated at physiological maturity; GY, grain yield at 15.5% moisture; GrainN, grain N content; R1DM, whole-plant dry matter accumulated at silking; R6DM, whole-plant dry matter accumulated at physiological maturity; PostN, N accumulated after silking; PostDM, dry matter accumulated after silking; RemobN, N remobilized to the grain; StoverN, stover N content; StoverDM, stover dry matter at physiological maturity; ΔStover, change in stover dry matter from silking to physiological maturity.