TERMINOLOGIES IN SOIL SCIENCE (SOIL SURVEY)

Question 1

The upper limit of soil which is the boundary between soil either air shallow water, live plants, or plant materials that have not begun to decompose.

Answer 1

Soil Surface

Question 2

Class of soils worldwide which shares a common suites of soil profile properties.

Answer 2

SOIL SERIES

Question 3

A hexagon column of soil measuring from 1 to 10 m2 in top surface area

Answer 3

Pedon

Question 4

The basic sampling unit used in soil survey.

Answer 4

Pedon

Question 5

An essential soil individual, comprising and identifiable series of soil in an area.

Answer 5

Polypedon

Question 6

Made up of multiple pedons and has distinctive characteristics that differentiate it from surrounding polypedons.

Answer 6

Polypedon

Question 7

A vertical cross section of the soil exposing all its horizons

Answer 7

SOIL PROFILE

Question 8

A layer of soil or soil mineral approximately parallel to the land surface and differing from adjacent horizon in physical, chemical and biological properties.

Answer 8

SOIL HORIZON

Question 9

A & B horizon, zone of pedogenic activity;

Answer 9

SOLUM

Question 10

Considered as the true soil

Answer 10

SOLUM

Question 11

These layers are reached by the roots for water and nutrient source.

Answer 11

SOLUM

Question 12

The biological and physical mixing of soil materials resulting into the homogenization of the solum.

Answer 12

PEDOTURBATION

Question 13

All loose materials above the bedrock

Answer 13

REGOLITH

Question 14

The transport of soil material from upper layers of soil to lower levels by downward percolation of water across soil horizons.

Answer 14

ELUVIATION

Question 15

Accumulation of dissolved or suspended soil materials in one area or horizon as a result of eluviations from another horizon.

Answer 15

ILLUVIATION