unproductive (adj.)

• abortive
• acarpous
• arid
• barren
• bootless
• celibate
• childless
• desolate
• drained
• dried-up
• dry
• exhausted
• fallow
• fruitless
• gaunt
• gelded
• impotent
• ineffective
• ineffectual
• infertile
• jejune
• leached
• menopausal
• nonproductive
• otiose
• profitless
• sterile
• unavailable
• unavailing
• uncultivated
• unfertile
• unfruitful
• unplowed
• unprofitable
• unremunerative
• unrewarding
• unsown
• untilled
• useless
• vain
• virgin
• waste
• wasted