Main quest Brew production

[Meslamtaea]

Hi,
Why cant I finish Main quest Brew production?
I Finished Fertile Ground and Wells, I have 4 Wheat Fields and I am level 37?

http://forum.thesettlersonline.com/attachment.php?attachmentid=5775&stc=1&d=1393065580

[Gerontius]

is it the correct type of wheat field?

[Meslamtaea]

Yes.