It's adjustable. Between the plants could be 13.5cm. - 30cm. according to how many beaks you put on. There are 6 - 12 beaks for the machine. And between the lane, you can set as you want. It's a single row model. There is also a double row model but the distance will be fixed to about 5cms. for the supplement fertilizer. One tank is for your rice, other tank is for fertilizer. When you roll the machine, both rice and fertilizer will be dropped side by side at the same time.