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100問 • 1年前

Jaybee Sanchez

通報

問題一覧

A dynamic natural body on the earth’s surface composed of both Living and non-living materials where plants can grow

Soil

The study of soil from the standpoint of higher plants or plant

Edaphology

The size of this soil particle is less than 1 um

Soil colloids

Nitrification carried out by autotrophic bacteria is not affected by Which of the following?

Redox potential

In relation to crop production, clayey soils are known to be

more fertile than sand

A soil consists of the three components, namely: solid, liquid and gas

all of the above

This macronutrient is not a component of any organic molecule in The plant; its function is more catalytic in nature and usually Deficient in coarse-textured soils.

Phosphorus

Component of amino adds such as methionine, cystein, and cystine And is usually deficient in waterlogged soils.

Sulfur

The soil is called a because it comes from the weathering of naturally occurring rocks and minerals

Natural body

Needed in chlorophyll synthesis and usually deficient in alkaline Soil

Iron

Needed in the synthesis of auxin and is usually deficient in Waterlogged soils.

Zinc

Rocks formed by cooling and solidification of molten magma and Lava in the crust

Igneous rocks

Individual soil layers or layers parallel to the ground surface.

Horizon

What is the moisture regime of the soil Tropaquepts which are Inceptisols that are found in the tropics?

aquic

The non-crystalline organic colloidal fraction of the soil.

Humus

Soil microorganism that degrade carbon – containing pesticide are Considered

Heterotrophs

The most abundant gas in the soil atmosphere is

The physicist who formulated the law governing the rate of Settling particles in viscous medium

Stoke

Under its natural occurrence a soil is aggregated and porous

All of the above

Rocks that are formed when magma id not reach the earth’s Surface but solidifies in the cavities or cracks that the magma had Made by pushing the surrounding rock apart or by melting or Dissolving it.

Intrusive rocks

Loose earth materials above solid rock

Regolith

Haplauents are young soils with minimal development. In what Order does the soil belong?

Entisols

Soil Classification System 23. The Philippine adopts the

United States Department of Agriculture (USDA)

A soil horizon is defined as

A soil layer that differs in recognized properties from other layers below

Soil texture that would be best for growing lowland rice

clay

A sedimentary rock which is a recemented clay

shale

A soil order characterized as shrinking and swelling dark clay soils

Vertisols

It is an amorphous or less crystalline clay developed from volcanic Ash

Allophane

The biochemical oxidation of ammonium to nitrate, predominantly By autotrophic bacteria.

Nitrification

An example of physical weathering process is

Exfoliation

Generally, coarse-textured soils are characterized as soils with

all of the above

These are naturally occurring inorganic substances with fairly Definite chemical composition and specfic physical properties

Minerals

A soil order characterized as embryonic soil with few diagnostic Features

Inceptisol

In strongly acid soils, the availability of most micronutrient cations Is

Increased

Generally, fine-textured soils are characterized to have

high ability to supply plant nutrients

The relative distribution of sand, silt, and clay is called soil

Texture

Minerals that are crystallized from the cooling of magma

Primary minerals

Andepts are soils that were derived from volcanic activity and Were origin ally classified as Inceptisols. What is the new order of These soils?

Andisols

The study of rock

Petrology

Which of these soils has the most rapid percolation rate?

Sandy soils

Soil texture refers to the coarseness or fineness of a soil

Sand is gritty

The primary source of calcium in the soil

Calcite

An example of a 2:1 expanding type of silicate mineral

Montmorillonite

Most of the N in the solid fraction of the soil is in the form of

Organic N

The molten mass where igneous rocks solidify from is:

Magma

The decomposition of the complex substances of rocks and Minerals resulting to changes in chemical composition, release of Soluble materials and formation of new minerals.

Ion exchange

It refers to the amount of exchangeable cations per unit weight of Dry soil.

Cation exchange capacity

Nitrate is not removed from the soil system by which of the Following?

Nitrogen fertilization

Metamorphosis is caused by

High pressure and temperature

It refers to the arrangement of primary soil particles into Secondary units or aggregates

Soil structure

This regime has mean annual soil temperature of 15t or higher But lower than 22 t.

Thermic

The weathering that takes place below the soil solum

Geochemical weathering

A subsoil with high clay accumulation is written in symbol as

The source of permanent negative charge of clays.

Isomorphous substitution

The source of positive charge of silicate clays.

protonation

Microaerophillic microorganisms require

minimal oxygen level

The weathered parent material corresponds to this horizon

These are natural soil aggregates

peds

A mean annual temperature of 8t or higher but lower than 15t Defines this soil temperature regime

mesic

This compound reacts with carbonic acid forming a more soluble Bicarbonate. Its reaction contributes to the weathering process.

carbonation

This horizon is plowed and rich in humus. It will be designated as Horizon.

A 25 gram soil saturated with 5 me Ca* has a cation exchangeCapacity equal to

20 me Ca/100 g soil

The principal form of nitrogen utilized during rapid plant growth Period is

NO3-

The true soil correspon ds to horizon

A,B

Characteristic soil structure of sandy soils

single - grained

In relation to crop production cdayey soils are known to be

all of the choices

The mean annual soil temperature is 22 tor higher

hyperthermic

A russian pedologist who published the first soil forming factor equation

jennykov

Compute the % base saturation of a soil with a CEC of 100 Me/100g and whose exchange sites are occupied by 20 me/100 g Of basiC cations.

20%

The relationship of percent base saturation and soil pH

%BS decreases as soil pH decreases

Particle density is a stable soil property and most agricultural soils Would have partice densities close to this value

2.66 g/cm

The fitness of a given type of land for specified kind of land use.

land suitability

The most influential factor in soil formation

climate

Are chemical elements taken up by plants in large quantities

macronutrients

Which of the following process is not mediated by soil microorganism?

p immobilization

Soil texture could be determined by

all of the choices

The minimum size of delineation is 0.2 hectare to 4 hectare the order of soil survey is

1st

In the soil profile parent material of soil is usually located in

lowest part

The general form of nutrients taken up by plant is

ions

Iron oxide mineral that contribute red color to many soils

hematite

The mineral supplying p is

apatite

Soil grown to corn is best cultivated when the soil consistency is

friable

Soil texture could be determined in the laboratory by

hydrometer method

The minimum size of delineation is 16 ha to 259 ha. The order of Soil survey is

3rd

Soil formation slows down because of constant mixing within the Profile, nullifying the colloid movement downward by

burrowing animals

The lowest category of the US Soil Taxonomy is

series

The form of nitrogen taken up by plants from the soil

What do you expect when you increase OM of the soil?

decrease the amount of N to apply

Calculate the gravimetric moisture content of the soil sample if its Fresh weight (FW) is 25 g and its oven dry weight (ODW) is 20 g.

25%

The upper diameter size limit of clay particles is

0.002 mm

Represent areas that should be permanently retained as forest Environment

preservation areas

Movement of material out of a portion of a soil profile as in an albic horizon

eluviation

This will retard soil profile development because it exposes new materials

steep slopes

Water deposited sediments are called

alluvial deposits

The major form of nitrogen in the soil is

organic

An element which is an important component of plant cell wall

calcium

Non-symbiotic N, fixing organisms in lowland soil.

bacteria

The resistance of a mineral to abrasion is

hardness

The softest mineral is

talc

100

Available water capacity is calculated as

Field capacity minus permanent wilting point

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問題一覧

A dynamic natural body on the earth’s surface composed of both Living and non-living materials where plants can grow

Soil

The study of soil from the standpoint of higher plants or plant

Edaphology

The size of this soil particle is less than 1 um

Soil colloids

Nitrification carried out by autotrophic bacteria is not affected by Which of the following?

Redox potential

In relation to crop production, clayey soils are known to be

more fertile than sand

A soil consists of the three components, namely: solid, liquid and gas

all of the above

This macronutrient is not a component of any organic molecule in The plant; its function is more catalytic in nature and usually Deficient in coarse-textured soils.

Phosphorus

Component of amino adds such as methionine, cystein, and cystine And is usually deficient in waterlogged soils.

Sulfur

The soil is called a because it comes from the weathering of naturally occurring rocks and minerals

Natural body

Needed in chlorophyll synthesis and usually deficient in alkaline Soil

Iron

Needed in the synthesis of auxin and is usually deficient in Waterlogged soils.

Zinc

Rocks formed by cooling and solidification of molten magma and Lava in the crust

Igneous rocks

Individual soil layers or layers parallel to the ground surface.

Horizon

What is the moisture regime of the soil Tropaquepts which are Inceptisols that are found in the tropics?

aquic

The non-crystalline organic colloidal fraction of the soil.

Humus

Soil microorganism that degrade carbon – containing pesticide are Considered

Heterotrophs

The most abundant gas in the soil atmosphere is

The physicist who formulated the law governing the rate of Settling particles in viscous medium

Stoke

Under its natural occurrence a soil is aggregated and porous

All of the above

Intrusive rocks

Loose earth materials above solid rock

Regolith

Haplauents are young soils with minimal development. In what Order does the soil belong?

Entisols

Soil Classification System 23. The Philippine adopts the

United States Department of Agriculture (USDA)

A soil horizon is defined as

A soil layer that differs in recognized properties from other layers below

Soil texture that would be best for growing lowland rice

clay

A sedimentary rock which is a recemented clay

shale

A soil order characterized as shrinking and swelling dark clay soils

Vertisols

It is an amorphous or less crystalline clay developed from volcanic Ash

Allophane

The biochemical oxidation of ammonium to nitrate, predominantly By autotrophic bacteria.

Nitrification

An example of physical weathering process is

Exfoliation

Generally, coarse-textured soils are characterized as soils with

all of the above

These are naturally occurring inorganic substances with fairly Definite chemical composition and specfic physical properties

Minerals

A soil order characterized as embryonic soil with few diagnostic Features

Inceptisol

In strongly acid soils, the availability of most micronutrient cations Is

Increased

Generally, fine-textured soils are characterized to have

high ability to supply plant nutrients

The relative distribution of sand, silt, and clay is called soil

Texture

Minerals that are crystallized from the cooling of magma

Primary minerals

Andepts are soils that were derived from volcanic activity and Were origin ally classified as Inceptisols. What is the new order of These soils?

Andisols

The study of rock

Petrology

Which of these soils has the most rapid percolation rate?

Sandy soils

Soil texture refers to the coarseness or fineness of a soil

Sand is gritty

The primary source of calcium in the soil

Calcite

An example of a 2:1 expanding type of silicate mineral

Montmorillonite

Most of the N in the solid fraction of the soil is in the form of

Organic N

The molten mass where igneous rocks solidify from is:

Magma

The decomposition of the complex substances of rocks and Minerals resulting to changes in chemical composition, release of Soluble materials and formation of new minerals.

Ion exchange

It refers to the amount of exchangeable cations per unit weight of Dry soil.

Cation exchange capacity

Nitrate is not removed from the soil system by which of the Following?

Nitrogen fertilization

Metamorphosis is caused by

High pressure and temperature

It refers to the arrangement of primary soil particles into Secondary units or aggregates

Soil structure

This regime has mean annual soil temperature of 15t or higher But lower than 22 t.

Thermic

The weathering that takes place below the soil solum

Geochemical weathering

A subsoil with high clay accumulation is written in symbol as

The source of permanent negative charge of clays.

Isomorphous substitution

The source of positive charge of silicate clays.

protonation

Microaerophillic microorganisms require

minimal oxygen level

The weathered parent material corresponds to this horizon

These are natural soil aggregates

peds

A mean annual temperature of 8t or higher but lower than 15t Defines this soil temperature regime

mesic

This compound reacts with carbonic acid forming a more soluble Bicarbonate. Its reaction contributes to the weathering process.

carbonation

This horizon is plowed and rich in humus. It will be designated as Horizon.

A 25 gram soil saturated with 5 me Ca* has a cation exchangeCapacity equal to

20 me Ca/100 g soil

The principal form of nitrogen utilized during rapid plant growth Period is

NO3-

The true soil correspon ds to horizon

A,B

Characteristic soil structure of sandy soils

single - grained

In relation to crop production cdayey soils are known to be

all of the choices

The mean annual soil temperature is 22 tor higher

hyperthermic

A russian pedologist who published the first soil forming factor equation

jennykov

Compute the % base saturation of a soil with a CEC of 100 Me/100g and whose exchange sites are occupied by 20 me/100 g Of basiC cations.

20%

The relationship of percent base saturation and soil pH

%BS decreases as soil pH decreases

Particle density is a stable soil property and most agricultural soils Would have partice densities close to this value

2.66 g/cm

The fitness of a given type of land for specified kind of land use.

land suitability

The most influential factor in soil formation

climate

Are chemical elements taken up by plants in large quantities

macronutrients

Which of the following process is not mediated by soil microorganism?

p immobilization

Soil texture could be determined by

all of the choices

The minimum size of delineation is 0.2 hectare to 4 hectare the order of soil survey is

1st

In the soil profile parent material of soil is usually located in

lowest part

The general form of nutrients taken up by plant is

ions

Iron oxide mineral that contribute red color to many soils

hematite

The mineral supplying p is

apatite

Soil grown to corn is best cultivated when the soil consistency is

friable

Soil texture could be determined in the laboratory by

hydrometer method

The minimum size of delineation is 16 ha to 259 ha. The order of Soil survey is

3rd

Soil formation slows down because of constant mixing within the Profile, nullifying the colloid movement downward by

burrowing animals

The lowest category of the US Soil Taxonomy is

series

The form of nitrogen taken up by plants from the soil

What do you expect when you increase OM of the soil?

decrease the amount of N to apply

Calculate the gravimetric moisture content of the soil sample if its Fresh weight (FW) is 25 g and its oven dry weight (ODW) is 20 g.

25%

The upper diameter size limit of clay particles is

0.002 mm

Represent areas that should be permanently retained as forest Environment

preservation areas

Movement of material out of a portion of a soil profile as in an albic horizon

eluviation

This will retard soil profile development because it exposes new materials

steep slopes

Water deposited sediments are called

alluvial deposits

The major form of nitrogen in the soil is

organic

An element which is an important component of plant cell wall

calcium

Non-symbiotic N, fixing organisms in lowland soil.

bacteria

The resistance of a mineral to abrasion is

hardness

The softest mineral is

talc

100

Available water capacity is calculated as

Field capacity minus permanent wilting point