The phrase "hay fields" refers to fields where grass or other plants are grown and cut to make hay, which is dried and used as animal feed. Full definition
It also incorporates a modified color palette and elements, including a blue sky and multiple shades of green, creating a rolling hay field. (petbusiness.com)
As farms disappear and forests return, the large swaths of hay fields and similar habitats that bobolink require for breeding and raising young continue to shrink in size and number. (massaudubon.org)
The Norse considered themselves farmers, he and others thought, tending hay fields despite the short growing season and bringing dairy cows and sheep from Iceland. (sciencemag.org)