Soil Tank Benefits You are here: KB Home Importance of Soil's Soil Tank Benefits < Back For many years it has been proven by numerous International and Australian research agencies that natural turfgrass provides the appropriate filter health and hygiene, and is an efficient erosion control agent that is sustainable through drought. Method of improving water efficiency for natural turfgrass growth is to ensure good soil physical conditions are available to support healthy root system which is the key to success with a healthily vibrant lawn. It surprises many people that in unrestricted conditions, grassroots can easily reach a depth of 20 to 30 cm especially in sandy soils.