In rule “The Dead”, change:

As a daily action, any Farmer may cause all Zombies for which they are the Owner to Shamble.

To:

As a daily action, any Farmer may cause all Zombies for which they are the Owner to Shamble. When doing so, they may also cause any Zombie that has not Shambled in the last 3 days to Shamble. Anyway, a Zombie may never shamble more than once a day.

Make a new Subrule to rule Resources, called “Zombejuice”:

Whenever a Zombie is destroyed in a Farmer’s plot, that Farmer gains 1 Juice. Whenever a Juicy Crop is destroyed on a Farmer’s Plot, they gain 3 Juice.

Add to the last sentences in rules “Juicer” and “Molotov Cocktail”:

and “Zombejuice”.

In those 2 sentences, change every iteration of the word “rule” with “rules”.