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Table 7.
N-use efficiency (%) by winter wheat and corn-for-grain grown in crop rotation and as continuous monocrops, average for 1994–2018, Selectia RIFC
| Crop rotation, continuous monocropping | Predecessors | Fertilization | Extra yields from fertiliz., t/ha | N taken up by extra yield, kg/ha | N applied with mineral fertilizers, kg a.i./ha | N-use efficiency % | Total N uptake on fert. plots, kg/ha | Share of soil fertility in yield formation, % | |
|---|---|---|---|---|---|---|---|---|---|
| Unfertil. | Fertilized | ||||||||
| Winter wheat | |||||||||
| Crop rotation | Oats-and-vetch for green mass | 4.55 | 5.14 | +0.59 | 19.5 | 90 | 21.7 | 169.6 | 88.5 |
| Continuous monocrop | Winter wheat | 1.96 | 3.02 | +1.06 | 35.0 | 90 | 38.9 | 99.7 | 64.9 |
| Corn-for-grain | |||||||||
| Crop rotation | Sugar beet | 5.54 | 6.06 | +0.52 | 12.0 | 0 | 0 | 139.4 | 100 |
| Continuous monocrop | Corn-for-grain | 3.86 | 5.71 | +1.85 | 42.6 | 60 | 71.0 | 131.3 | 67.6 |
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