The Spatio-temporal Pattern Change and Optimum Layout of Grain Production in the West of Northeast China
| 安全程度 | 安全级 | 较安全级 | 临界安全级 | 较不安全级 | 不安全级 |
|---|---|---|---|---|---|
| 等级 安全评价区间等级 | Ⅰ Di(ω)≥0.9 | Ⅱ 0.9> Di(ω)≥0.6 | Ⅲ 0.6> Di(ω)≥0.5 | Ⅳ 0.5> Di(ω)≥0.3 | Ⅴ Di(ω)<0.3 |
| 陈玉洁, 张平宇, 刘世薇, 谭俊涛 | ||||||||||||
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The Spatio-temporal Pattern Change and Optimum Layout of Grain Production in the West of Northeast China |
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| Yujie Chen, Pingyu Zhang, Shiwei Liu, Juntao Tan | ||||||||||||
| 表4 东北西部耕地生态安全评价等级 | ||||||||||||
| Table 4 Evaluation rank of cultivated land ecological security in the west of Northeast China | ||||||||||||
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