Soil

Smallest volume of soil that can be considered a soil individual/body

pedon

This is a natural aggregate

ped

It is a diagnostic horizon that occurs at the soil surface which includes the

upper part of the soil darkened by organic matter, the upper eluvial

horizons, or both:

epipedon

It is the systematic examination, description, classification , and mapping

of soils in an area

soil survey

The broadest category of soil taxonomy

order

It is a thick dark

colored surface diagnostic horizon with high base

saturation:

mollic

It is like the mollic epipedon except that it has low base saturation

umbric

The broadest category of soil taxonomy:

order

Soils with no diagnostic horizons

Entisols

Soils with mollic epipedon and base saturation percentage (BSP>50%)

Mollisol

Soil with a warm temperature regime, an argillic horizon and percent base

saturation (PBS) <35%

Ultisols

A soil temperature regime wherein the mean annual soil temperature is

220C or higher and the difference between mean summer and mean winter

temperature is less than 50C

isohyperthermic

The most highly weathered soil characterized by the presence of an oxic

subsurface horizon

Oxisols

Soils of volcanic origin are classified under order

Andisol

A dark red Ultisols with udic moisture regime is

Udults

Young soils beginning to show development of genetic horizons

Inceptisols

They are swelling and cracking soils common in lowlands

Vertisols

The soil moisture regime characterized by sufficient moisture throughout the year

udic

The soil moisture regime that is characterized by water saturation

aquic

The soil with a name Typic tropudults belongs to order

Ultisols

A suborder Hemists means the soil falls under the order

Histosols

One side of a pedon

profile

A soil unit in a landscape usually consists of a group of very similar

pedons closely associated together in the field

polypedon

A system of soil classification in the Philippines based on the concept of a

precisely defined, selected horizon for classifying soil profiles

soil taxonomy

It is a systematic arrangement of soils into groups or categories on the

basis of their characteristics

soil classification

Basis for mapping the distribution of Philippine soils

soil series/type

It is an epipedon that fails all the requirements of a mollic.

ochric

A diagnostic horizon that is like argillic except for its high sodium content

natric

The total number of soil orders classified under the soil taxonomy

12

The most highly weathered soil characterized by the presence of an oxic

subsurface horizon

Oxisols

The 12th soil order covering all soils which are permanently frozen/covered

with snow

Gelisols

The soil with a name Typic tropudalfs belongs to order

Alfisols

A suborder Udults means the soil falls under the order

Ultisols

A suborder Fibrists means the soil falls under the order

Histosols

A suborder Histels means the soil falls under the order

Gelisols

Asuborder Aquands means the soil falls under the order

Andisols

A suborder Arents means the soil falls under the order

Entisols

A suborder Udept means the soil falls under the order

Inceptisols

These are Mollisols in aquic moisture regime:

Aquolls

These are Ultisols in udic moisture regime:

Udults

These are the soils formed from volcanic ash and young volcanic materials:

Udands