乾芻 is read as かんすう (kansuu) and means hay.
かんすう
kansuu
かんき
dry season
かんでんち
dry cell
かんそう
insipidity
かんぱい
drinking one's glass dry
かんぶつ
dry provisions
かわかす
to dry (clothes, etc.)
かわく
to get dry
かんそうき
drying machine
かわき
drying
かんぱん
cracker
かんちのうほう
dry farming
かんしきこうほう
dry construction