Table 1. Types of trend patterns of yield and planted area and sustainability ranks of productivity.
| Type | Rice | Wheat | Maize | |
|---|---|---|---|---|
| Yield | Never improved | 54 (3.31%) | 130(6.63%) | 107(5.19%) |
| Increasing | 671(41.12%) | 969(49.39%) | 1034(50.17%) | |
| Stagnated | 879(53.86%) | 823(41.95%) | 874(42.41%) | |
| Collapsed | 28(1.72%) | 40(2.04%) | 46(2.23%) | |
| Sum | 1632 | 1962 | 2061 | |
| Area | Never improved | 175(15.15%) | 116(8.35%) | 80(7.78%) |
| Increasing | 102(8.83%) | 21(1.51%) | 374(36.38%) | |
| Stagnated | 559(48.40%) | 755(54.36%) | 557(54.18%) | |
| Collapsed | 319(27.62%) | 497(35.78%) | 17(1.65%) | |
| Sum | 1155 | 1389 | 1028 | |
| Sustainability | Rank 1 | 44(4.04%) | 5(0.39%) | 171(17.78%) |
| Rank 2 | 76(6.99%) | 43(3.38%) | 56(5.82%) | |
| Rank 3 | 257(23.62%) | 418(32.84%) | 419(43.56%) | |
| Rank 4 | 396(36.40%) | 354(27.81%) | 276(28.69%) | |
| Rank 5 | 315(28.95%) | 453(35.59%) | 40(4.16%) | |
| Sum | 1088 | 1273 | 962 |
The percentage is the ratio of number of counties relative to tracked counties.