Sometimes when I plant 7 cabbage seeds in my upkeep 50% field it doesn't work,I have to right click the field with 8 seeds then 1 seed remains
I checked the wiki:
When a field is at 100% upkeep the following are required to plant 1 field of a crop:
50 seeds of cotton
50 seeds of cereal
15 seeds of cabbage
50 seeds of pumpkin
50 seeds of corn
When the field is 50% upkeep the following are required:
25 seeds of cotton
25 seeds of cereal
7 seeds of cabbage
25 seeds of pumpkin
25 seeds of corn
Seems exact number is 7.5 ?