A couple of months ago Tim Farris from LandFund Partners gave a presentation about farmland investing to the CFA institute. The hour long video is a background about investing in farmland, more from a macro perspective.
The presenter notes that when he got into the business he though that he would be making small investments in 100 acre farms, but quickly realized that he could get much higher rents per acre with 1000 acre farms. It is often underappreciated about how much it costs to move equipment and people from one field to another. Scale helps.
https://players.brightcove.net/1183701590001/default_default/index.html?videoId=5491582331001