There are several steps to do this:
I. First, harvest mature wheat.
Two, after that take the wheat and feed it to cows, sheep, pigs, etc. It is possible to get animal poop, which is fertilizer.
Three, take the animal's poop to the crop to use, it can promote the growth of the crop, can be used many times until the crop is mature.
four, or synthesize a square pumpkin lamp from a square pumpkin and a small lump of coal, a haystack from wheat, and a wooden fence from wooden planks.
V. Then place wooden fences to the left, right and below the haystack. Then place a pumpkin lamp on top to generate a scarecrow, which also promotes plant growth.
VI. Then place pumpkin lamps on top to generate scarecrows, which also promote plant growth.