Immaterial or supernatural: angels and other metaphysical beings. 4. often Metaphysical Of or relating to the poetry of a group of 17th-century English poets whose verse is characterized by an intellectually challenging style and extended metaphors comparing very dissimilar things.
Soil types according to depth are as follows: 1) Shallow Soil - Soil depth less than 22.5cm. Only shallow rooted crops are grown in such soil, e.g. Paddy, Nagli. 2) Medium deep soil - Soil depth is 22.5 to 45cm. Crops with medium deep roots are grown in this type of soil e.g. Sugar cane, Banana, Gram. 3) Deep soil - Soil depth is more than 45cm. Crops with long and deep roots are grown in this type a soil e.g.
The Best Agricultural Soils in the World. While soil covers about 10 percent of the earth's surface, not all the soil is optimal for agriculture and growing food. Fertile soils are highly effective at retaining water and contain high levels of nutrients. Specific soils offer different advantages to growing various plants, food and trees.