handy dandy commands to use and abuse.
//br sphere farmland
/mask grass_block This command replaces grass with farmland
//br sphere 59:7 6
/mask >farmland This makes a brush of sphere radius 6 that puts fully grown wheat on top of only farmland
The same can be done with potatoes or beets or carrots etc by replacing the “59:7” with “potatoes” or “carrots” or “beetroots”, but this will just plant the seeds, so you will have to crank the tickspeed up to like 10,000 to make them grow almost instantly
Credit belascole