Classical agricultural texts say one plows in spring and weeds in summer.
Tips
history
耨 'to hoe / weed' is literary and not used independently in modern speech. It appears in the classical fixed pair 耕 (to plow) plus 耨; modern Chinese uses 锄 (to hoe) and 除草 (to weed) instead.
register
Literary and historical only — found in classical agricultural writing and idioms like 深耕易耨, not in everyday language.