| Index | Factor1 | Factor2 | Factor3 |
| Arable land area per capita | −0.986 | −0.106 | 0.045 |
| Grain gap per capita | −0.407 | 0.879 | 0.086 |
| Agricultural labor force | 0.152 | 0.926 | −0.043 |
| Fluctuation rate of grain yield | −0.067 | −0.285 | −0.772 |
| Ratio of grain sown area to crop sown area | −0.961 | 0.007 | −0.101 |
| Degree of agricultural mechanization | 0.926 | −0.340 | −0.069 |
| Per unit area yield of grain | 0.972 | −0.088 | −0.050 |
| Grain trade dependency | −0.054 | −0.192 | 0.849 |
| Inflation rate of grain price | −0.359 | 0.894 | 0.066 |
| Per capita occupancy of grain | 0.590 | −0.182 | −0.150 |
| City Engel’s Coefficient | 0.940 | −0.140 | 0.155 |
| Countryside Engel’s Coefficient | 0.908 | −0.330 | 0.062 |