'Farm' in the Bible

For which one of you, when he wants to build a watchtower [for his guards], does not first sit down and calculate the cost, to see if he has enough to finish it?

So he went and hired himself to one of the inhabitants of that country, who sent him on to his farm to tend swine;

"Now his elder son was out on the farm; and when he returned and came near home, he heard music and dancing.

But which of you who has a servant ploughing, or tending sheep, will say to him when he comes in from the farm, 'Come at once and take your place at table,'