| Keyword | Most frequent expressions (number of websites) |
|---|---|
| yi | chkheidze yi (1), yi wei (1), hexagram yi (1), yi globe (1), che yi (1), yi jing (1), cosmo yi (1), zhigang yi (1), yi jia (1), guan yi (1), yi ding (1), xie yi (1), wang yi (1) |
| yield | high yield (12), yield quality (3), crop yield (3), yield safe (3), yield map (2), fruit yield (2), yield technology (2), time yield (2), yield main (2), yield year (2), annual yield (2), yield trial (2), average yield (2) |