what are the farm implements during the stone age?

Answer 1

If they farmed at all, I'd guess that their implements consisted of rocks and sticks.

Answer 2

They were simple:
The digging stick was used like a spear to stab the soil and make an opening for a seed to be dropped into. It was also used to harvest roots and root crops.
Sickles were made of a curved piece of wood and sharp pieces of flint shoved in side by side along the edge. This was used to harvest grains. You had to stoop over, grab a handful of grain stalks, and chop them off. This labor was very repetitive and tedious.
Another tool was the seed sack, which people carried about the shoulder. A handful of seeds would be picked up and then scattered in the field.
Lastly, the winnowing basket. People made a tightly woven shallow basket, put the heads of grain in, and shook and bounced them in the wind while rotating the basket. The wind carried off the chaff and left the grain behind.
People also used a threshing floor, where they would step on the grain to separate it from the stalks, but you can't really call a floor an implement.

Answer 3

Stones ... duh!