The rear position is good.

1. Harvesting process: The rear-mounted garlic harvester can directly load the harvested garlic into containers or bags, reducing subsequent manpower and time costs; while the front-mounted garlic harvester needs to harvest the garlic one by one. Placing it on the ground requires more manpower and time.

2. In terms of cost: Rear-mounted harvesters are lower in cost than front-mounted harvesters and are suitable for small-scale garlic cultivation, while front-mounted garlic harvesters are not suitable.