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.
Soil is essential for plant growth for several reasons. Soil provides plant roots with nutrients, water and air. Soil also serves to anchor the plant. There are different types of soil, and it is very common to find the foundation soil around your house to differ from your property line soil. Soil is comprised of three mineral particle sizes: sand, silt and clay. Large, course mineral particles are sand, fine mineral particles are silt, and very fine mineral particles are clay. An ideal soil is composed of 45 percent mineral (sand, silt and clay), five percent organic material (humus or plant debris and soil organisms), 25 percent water and 25 percent air.