Okay, so the term “truck farm” has nothing intrinsically to do with trucks. “Truck” is taken from the old north French word “troquer” which means “to barter” or “trade.” And here I’ve been wrong all of this time.

Fact is, many of the roadside farms that I’ve referred to as “Truck Farms” are actually “Market Gardens” in that they provide fresh produce for sale to a local market – usually a city – rather than to feed the farmer’s family.

Evidently, what distinguishes a “market” from a “farm” is the implement used. The former, a hoe, the latter, a plough.

Also, selling wholesale will earn a farmer 10% – 20% of the retail price while selling directly will earn 100% or $120/acre – $1200/acre vs $8k/acre – $20k/acre.

Source:https://en.wikipedia.org/wiki/Market_garden#:~:text=Truck%20farms%20produce%20vegetables%20for,barter%22%20or%20%22exchange%22.