cultivator
cul.ti.va.tor \'k*l-t*-.va-t-*r\ n : one that cultivates; esp : an implement to loosen the soil while crops are growing
Webster's English Dictionarycul.ti.va.tor \'k*l-t*-.va-t-*r\ n : one that cultivates; esp : an implement to loosen the soil while crops are growing