To enrich the soil by the action of the air

To enrich the soil by the action of the air

1. To destroy weeds.

2. To let air enter the soil.

3. To enrich the soil by the action of the air.

4. To retain the moisture by preventing its evaporation.

corn
corn
cabbage	beets	radishes
cabbage	beets	eggplants
onions	peas	beans
onions	peas	beans
oyster-plants	okra	parsley	parsnips
oyster-plants	okra	parsley	parsnips
tomatoes
tomatoes
strawberries	currants	raspberries	blackberries
strawberries	currants	raspberries	blackberries
strawberries	currants	raspberries	blackberries
strawberries	currants	raspberries	blackberries

Source: Agriculture for Beginners