| Primary index | Secondary index | Unit | Code |
| Grain production link | Arable land area per capita | hectare | I1 |
| Grain gap per capita | kg | I2 | |
| Agricultural labor force | 10000 | I3 | |
| Fluctuation rate of grain yield | % | I4 | |
| Ratio of grain sown area to crop sown area | % | I5 | |
| Degree of agricultural mechanization | kW | I6 | |
| Per unit area yield of grain | kg | I7 | |
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| Grain circulation link | Grain trade dependency | % | I8 |
| Inflation rate of grain price | % | I9 | |
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| Grain consumption link | Per capita occupancy of grain | kg | I10 |
| City Engel’s Coefficient | % | I11 | |
| Countryside Engel’s Coefficient | % | I12 |