Table 2 N removed by harvest, N fertilizer surplus, and apparent N use efficiency (NUE) within yield stability classes.
From: Yield stability analysis reveals sources of large-scale nitrogen loss from the US Midwest
State | Fertilizer N Rate | Harvested N | Surplus N | NUE | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Stable High | Stable Low | Unstable | Stable High | Stable Low | Unstable | Stable High | Stable Low | Unstable | ||
IL | 179–229 | 145 | 108 | 131 | 34–84 | 71–121 | 48–98 | 63–81 | 47–60 | 57–73 |
IN | 168–251 | 135 | 99 | 122 | 33–116 | 69–152 | 46–129 | 54–80 | 39–59 | 49–73 |
IA | 152–208 | 148 | 115 | 138 | 4–60 | 37–93 | 14–70 | 71–97 | 55–76 | 66–91 |
MI | 143–198 | 131 | 95 | 118 | 12–67 | 48–103 | 25–80 | 66–92 | 48–66 | 60–83 |
MN | 154–212 | 145 | 115 | 135 | 9–67 | 39–97 | 19–77 | 68–94 | 54–75 | 64–88 |
MO | 189–260 | 118 | 85 | 105 | 71–142 | 104–175 | 84–155 | 45–62 | 33–45 | 40–56 |
ND | 137–190 | 111 | 83 | 102 | 26–79 | 54–107 | 35–88 | 58–81 | 44–61 | 54–74 |
OH | 155–234 | 136 | 100 | 122 | 19–98 | 55–134 | 33–112 | 58–88 | 43–65 | 52–79 |
SD | 134–182 | 118 | 89 | 109 | 16–64 | 45–93 | 25–73 | 65–88 | 49–66 | 60–81 |
WI | 111–155 | 132 | 100 | 122 | 0–23 | 11–55 | 0–33 | 85–119 | 65–90 | 79–110 |
Total Average | 152–212 | 132 | 99 | 120 | 22–80 | 53–113 | 33–92 | 63–88 | 48–66 | 58–81 |
