How many letters does the top answer for “pertaining to tillage of the earth, or agriculture.” have?

The most common answer is geoponic (8 letters).

Crossword clue: pertaining to tillage of the earth, or agriculture.

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

geoponic 8 letters web-def

Pertaining to tillage of the earth, or agriculture.

geoponical 10 letters web-def

Pertaining to tillage of the earth, or agriculture.

of or pertaining to the earth. 50% similar → tellural