MASS PRODUCTION Trophy
You have sown more than 100 hectares.
This is tied to Harvest King as crops have to be sowed before they can be harvested. I however got this well before Harvest King because I forgot that I had sown fields several time and ploughed them, so make sure you remember what is planted and what need ploughing as it's a big waste of money and time otherwise. See Harvest King for boosting tips.
Please note: you need 101, not 100.