亜種[ashu] subspecies
異機種[ikishu] heterogenous equipment
異種[ishu] different kind (species, variety)
育種[ikushu] (plant) breeding
育種家[ikushuka] (plant) breeder

育種所[ikushujo] (plant) nursery
一種[isshu] species
一粒種[hitotsubudane] an only child
種違い[tanechigai] half-brother
艶種[tsuyadane] love affair

耕す[tagayasu] to till
耕具[kougu] farm tools
耕作[kousaku] cultivation
耕作者[kousakusha] cultivator
耕地[kouchi] arable land

晴耕雨読[seikouudoku] working in the field in fine weather and reading at home in rainy weather
中耕機[chuukouki] cultivator
農耕[noukou] farming
不耕作地[fukousakuchi] nonfarming land
未耕地[mikouchi] uncultivated land