1) Agricultural terminology 2) English dialect word 
Earsh (noun) (ersc) was used in South and West England to describe a stubble field in which a grain crop – wheat, barley or rye - had been harvested, leaving short stubble or short stalks. It is frequently pronounced `ash`. It is written also as arrish, arish, or ersh. The field is prepared for seeding by plowing the stubble into the ground, o.....
• (n.) See Arrish.
Earsh noun See Arrish .