Covered in or consisting of sheaves, especially of grain or other crop.
The word 'sheafy' makes people think of fields, farms, and harvest time.
Examples:
The sheafy field was ready for harvest.
The farmer gathered the sheafy wheat.
The sheafy barn was full of grain.
The sheafy scarecrow stood guard over the field.
The sheafy meadow stretched as far as the eye could see.
The sheafy haystacks dotted the landscape.