What Am I Riddles

Question: What do you use to hoe a row, slay a foe, and wring with woe?

Question: What kills a lot of people but is harmless?

Question: What grows shorter as it grows older?

Question: I have mountains but no heights I have seas but no water I have forests but no trees I have North & South & East & even West, but no direction What am I?

Question: You use a knife to slice my head and weep beside me when I am dead.

What am I?