Soil Science Quizzes, Questions & Answers

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Soil Formation Quizzes

Moving the Earth: Erosion Deposition Quiz

The great moving day of the natural world. While one area loses its soil to wind and water, another area gains it as the sediment settles. This soil erosion and deposition quiz tra...

Questions: 20 | Attempts: 44 | Last updated: Mar 09, 2026

Sample Question
What is the primary difference between erosion and weathering?

Erosion involves the movement of sediment, while weathering breaks it down in place.

Weathering is caused by wind, while erosion is caused by water.

Erosion creates rocks, while weathering destroys them.

There is no difference between the two processes.

Life in the Dirt: Soil Formation Biology Quiz

Life is a master builder of earth. From tree roots cracking stones to earthworms mixing nutrients, plants and animals are essential for turning rock into soil. This soil formation ...

Questions: 20 | Attempts: 16 | Last updated: Mar 09, 2026

Sample Question
Which organisms are primarily responsible for breaking down dead organic matter into humus?

Decomposers

Producers

Herbivores

Predators

Breaking Down the Earth: Weathering Types Quiz

Breaking rocks down without moving them. Rocks can be cracked by freezing water or dissolved by acidic rain. This weathering types quiz compares the mechanical "hammer" o...

Questions: 20 | Attempts: 14 | Last updated: Mar 09, 2026

Sample Question
What is the primary difference between physical and chemical weathering?

Physical changes the color

Chemical changes the size

Chemical changes the composition

Physical creates new minerals

All Soil Formation Quizzes

Soil Profile Quizzes

Soil Micromorphology Quiz: Thin Sections and Soil Fabric

This assessment focuses on soil micromorphology, specifically examining thin sections and soil fabric. It evaluates your understanding of soil structure, particle arrangement, and ...

Questions: 15 | Attempts: 13 | Last updated: Mar 23, 2026

Sample Question
What is soil micromorphology, and what is its primary purpose in pedological research?

The study of the geographic distribution of different soil types across a landscape

The measurement of soil particle size using laser diffraction techniques

The microscopic study of the composition, fabric, and pedogenic features of undisturbed soil thin sections to understand soil-forming processes at the microscale

The chemical analysis of soil extracts to determine nutrient concentrations

Soil Formation Quiz: Pedogenesis From Parent Rock to Profile

This quiz focuses on soil formation, exploring the processes of pedogenesis from parent rock to soil profile. It evaluates your understanding of key concepts such as soil horizons,...

Questions: 15 | Attempts: 12 | Last updated: Mar 23, 2026

Sample Question
What is pedogenesis?

The scientific study of soil pollution and contamination

The process by which soil erodes and is transported to new locations

The classification of soils based on their color and texture

The process of soil formation from parent material over time through physical, chemical, and biological processes

Eluviation and Illuviation Quiz: Soil\'s Internal Traffic System

This quiz focuses on eluviation and illuviation, the processes of soil layer movement and nutrient transport. It evaluates your understanding of how these processes impact soil hea...

Questions: 15 | Attempts: 11 | Last updated: Mar 23, 2026

Sample Question
What is eluviation, and in which soil horizon does it primarily occur?

The upward movement of capillary water carrying dissolved salts toward the soil surface

The downward removal of clay particles, iron, aluminum, and organic matter from a soil horizon by percolating water, primarily occurring in the E horizon

The physical breakdown of rock fragments by freeze-thaw cycles in the uppermost soil layer

The accumulation of organic material at the base of the A horizon through biological decomposition

All Soil Profile Quizzes

Soil Properties Quizzes

Soil Texture Triangle Quiz: Classify Any Soil by Grain Size

This quiz focuses on classifying soil based on grain size using the soil texture triangle. It evaluates your understanding of soil components and their proportions, essential for a...

Questions: 15 | Attempts: 17 | Last updated: Mar 23, 2026

Sample Question
What is soil texture, and what does it describe about a soil sample?

The color of the soil as measured using standardized color charts

The relative proportions of sand, silt, and clay particles in a soil sample

The amount of organic matter and humus present in the topsoil layer

The arrangement of soil particles into clumps and aggregates called peds

Hydraulic Conductivity Quiz: Saturated Flow and Soil Permeability

This assessment focuses on hydraulic conductivity, evaluating your understanding of saturated flow and soil permeability. By answering questions related to key concepts like Darcy'...

Questions: 15 | Attempts: 14 | Last updated: Mar 23, 2026

Sample Question
What is saturated hydraulic conductivity, and what does it measure in a soil?

The total volume of water that a soil can hold at maximum capacity

The rate at which water moves through a fully saturated soil under a unit hydraulic gradient, reflecting the ease with which the soil transmits water

The pressure at which water enters dry soil pores during the first rainfall event

The ratio of pore water pressure to total soil stress at saturation

Soil Thermal Properties Quiz: Heat, Diffusivity, and Soil Profiles

This quiz focuses on soil thermal properties, evaluating your understanding of heat transfer, diffusivity, and soil profiles. By exploring these concepts, you will enhance your kno...

Questions: 15 | Attempts: 11 | Last updated: Mar 23, 2026

Sample Question
What is thermal diffusivity of soil, and what does it quantify about heat movement through a soil profile?

The total amount of heat energy stored in a given volume of soil at a fixed temperature

The rate at which temperature changes propagate through the soil profile in response to surface temperature fluctuations, determined by the ratio of thermal conductivity to volumetric heat capacity

The temperature at which soil minerals begin to change phase under geothermal heating

The rate at which soil surfaces radiate infrared energy to the atmosphere above

All Soil Properties Quizzes

Soil Classification Quizzes

Soil Orders Quiz: Soil Taxonomy

This quiz focuses on soil orders within soil taxonomy, assessing your understanding of different soil types and their characteristics. By exploring key concepts in soil classificat...

Questions: 15 | Attempts: 24 | Last updated: Mar 23, 2026

Sample Question
What is Soil Taxonomy, and which organization developed it?

A system for measuring soil color developed by the United Nations

A global atlas of soil maps published by the Food and Agriculture Organization

A classification system for rocks and minerals developed by NASA

A hierarchical system for classifying soils into groups based on measurable properties, developed by the United States Department of Agriculture

Diagnostic Horizons Quiz: Surface, Subsurface, and Soil Identity

This assessment focuses on understanding surface, subsurface, and soil identity. It evaluates your knowledge of soil properties, layers, and their significance in environmental sci...

Questions: 15 | Attempts: 18 | Last updated: Mar 23, 2026

Sample Question
What is the purpose of diagnostic horizons in the United States Soil Taxonomy classification system?

To describe the color of soil horizons using standardized Munsell notation

To identify the parent rock type from which a soil developed based on mineralogy

To measure the depth of the water table below different soil types

To provide quantitatively defined, measurable horizon properties that serve as the criteria for classifying soils into orders, suborders, and lower categories

Soil Classification Systems Quiz: USDA, FAO

This assessment focuses on soil classification systems used by USDA and FAO. It evaluates your understanding of various soil types and their characteristics, essential for agricult...

Questions: 15 | Attempts: 12 | Last updated: Mar 23, 2026

Sample Question
What are the two most widely used international soil classification systems alongside the United States Soil Taxonomy?

The Chinese Soil Classification System and the Russian Dokuchaev System

The World Reference Base for Soil Resources and the FAO-UNESCO Soil Classification System

The British Soil Classification System and the German Soil Classification System

The Canadian System of Soil Classification and the Australian Soil Classification

All Soil Classification Quizzes

Soil Fertility Quizzes

Plant Nutrients Quiz: Macronutrients, Micronutrients, and Deficiency

This quiz focuses on plant nutrients, covering macronutrients and micronutrients essential for plant health. You'll evaluate your understanding of nutrient functions and deficiency...

Questions: 15 | Attempts: 24 | Last updated: Mar 23, 2026

Sample Question
What are plant macronutrients and how do they differ from micronutrients?

Macronutrients are nutrients added to soil through synthetic fertilizers while micronutrients come only from natural organic sources

Nutrients required by plants in relatively large amounts including nitrogen, phosphorus, and potassium, as opposed to micronutrients which are equally essential but needed in much smaller quantities

Macronutrients are nutrients found in rocks below the soil while micronutrients are those dissolved in rainwater

Macronutrients are nutrients that improve soil texture while micronutrients affect only the flavor and color of food crops

Cation Exchange Capacity Quiz: CEC, Fertility, and Soil Charge

This assessment explores cation exchange capacity, a crucial concept in soil fertility and charge management. It evaluates your understanding of how soil interactions affect nutrie...

Questions: 15 | Attempts: 13 | Last updated: Mar 23, 2026

Sample Question
What is cation exchange capacity and why is it an important measure of soil fertility?

The maximum rate at which water can flow through soil pores during heavy rainfall events

The ability of a soil to store and supply positively charged nutrient ions by holding them on negatively charged clay and organic matter surfaces, preventing their loss through leaching while keeping them available for plant uptake

The total concentration of dissolved salts in soil water that affects osmotic pressure on plant roots

The rate at which soil microorganisms break down organic matter and release nutrients into the soil solution

Nutrient Management Quiz: Precision Agriculture and Soil Fertility

This assessment focuses on precision agriculture and soil fertility, evaluating your understanding of nutrient management practices. You'll explore key concepts such as soil health...

Questions: 15 | Attempts: 12 | Last updated: Mar 23, 2026

Sample Question
What is precision agriculture and what core concept distinguishes it from conventional uniform field management?

An agricultural approach that uses the most precise mechanical equipment to minimize fuel consumption during field operations

The application of space-age satellite technology to coordinate planting dates across multiple farms in a region

An agricultural philosophy that eliminates the use of all synthetic inputs through precise application of only organic amendments

An approach that recognizes and manages spatial and temporal variability within fields by applying inputs at variable rates matched to actual site-specific conditions rather than applying uniform rates based on whole-field averages

All Soil Fertility Quizzes

Soil Chemistry Quizzes

Soil pH Quiz: Acidity, Aluminum Toxicity, and Nutrient Lock-Up

This quiz focuses on soil pH, examining its impact on acidity, aluminum toxicity, and nutrient availability. It evaluates your understanding of how soil pH influences plant health ...

Questions: 15 | Attempts: 18 | Last updated: Mar 23, 2026

Sample Question
What does soil pH measure and what scale is used to express it?

Soil pH measures the total amount of calcium dissolved in soil water expressed as milligrams per liter

Soil pH measures the concentration of hydrogen ions in the soil solution, expressed on a logarithmic scale from 0 to 14 where 7 is neutral, below 7 is acidic, and above 7 is alkaline

Soil pH measures the ratio of organic matter to mineral content in a soil sample and ranges from 1 to 10

Soil pH measures the amount of nitrogen available in the root zone expressed as a percentage of total soil dry weight

Base Saturation Quiz: Buffer Capacity and Soil Acidity

This assessment focuses on base saturation, buffer capacity, and soil acidity. It evaluates your understanding of how these concepts affect soil health and fertility. By taking thi...

Questions: 15 | Attempts: 15 | Last updated: Mar 23, 2026

Sample Question
What is the buffer capacity of a soil and why is it important for understanding pH management?

Buffer capacity is the physical ability of a soil to absorb water without changing its density or porosity

The resistance of a soil to pH change when acid or base is added, determined primarily by the quantity of exchangeable cations, clay content, and organic matter, which means that soils with high buffer capacity require more lime or acidifier to shift pH than weakly buffered sandy soils

Buffer capacity measures how much fertilizer a soil can hold before nutrients leach into groundwater

Buffer capacity is the chemical tendency of soil minerals to dissolve and release nutrients to the soil solution when plants remove them through uptake

Redox Potential Quiz: Hydric Soils, Waterlogging, and Electron Flow

This assessment focuses on redox potential in hydric soils and waterlogged conditions. It evaluates understanding of electron flow, soil chemistry, and environmental impacts, makin...

Questions: 15 | Attempts: 12 | Last updated: Mar 23, 2026

Sample Question
What is redox potential in soils and what does it indicate about soil chemical conditions?

Redox potential measures the concentration of plant-available phosphorus released when iron minerals dissolve in waterlogged soils

Redox potential, expressed in millivolts, measures the tendency of the soil environment to donate or accept electrons, with high positive values indicating oxidized well-aerated conditions and low or negative values indicating reduced anaerobic conditions where electron-accepting compounds are depleted

Redox potential measures the electrical resistance of soil minerals to nutrient ion movement between soil particles

Redox potential measures the chemical energy stored in soil organic matter available to fuel microbial decomposition processes

All Soil Chemistry Quizzes

Soil Physics Quizzes

Soil Structure Quiz: Aggregates, Stability, and Pore Networks

This assessment focuses on soil structure, specifically examining aggregates, stability, and pore networks. It evaluates your understanding of how these elements affect soil health...

Questions: 15 | Attempts: 16 | Last updated: Mar 23, 2026

Sample Question
What is a soil aggregate and why is it important for soil health?

A soil aggregate is a layer of compacted clay formed when heavy machinery repeatedly crosses agricultural fields

A cluster of soil particles including sand, silt, and clay held together by organic matter, fungal hyphae, and microbial byproducts that forms the building blocks of good soil structure and creates pore spaces for air, water, and roots

A soil aggregate is a concentrated deposit of mineral nutrients that forms naturally in the subsoil and releases nutrients slowly to plant roots

A soil aggregate refers to the total mineral content of a soil sample measured by laboratory chemical digestion methods

Solute Transport Quiz: Porous Media, Dispersion, and Contaminant Flow

This assessment evaluates your understanding of solute transport in porous media, focusing on dispersion and contaminant flow. By answering questions related to these key concepts,...

Questions: 15 | Attempts: 11 | Last updated: Mar 23, 2026

Sample Question
What is solute transport in porous media and why is it important for understanding soil and groundwater contamination?

Solute transport refers exclusively to the movement of dissolved plant nutrients from soil to crop roots during transpiration

Solute transport is the physical process of sound wave propagation through saturated soil columns used to measure soil compaction

Solute transport refers only to the movement of suspended sediment particles in surface runoff and has no relevance to dissolved chemical movement in soil

The movement of dissolved substances through the interconnected pore spaces of soil and other porous media driven by advection with the bulk water flow and diffusion along concentration gradients, which determines how quickly contaminants and nutrients move through the soil profile toward groundwater

Soil Water Potential Quiz: Capillary Rise, Tension, and Plant Uptake

This assessment focuses on soil water potential, exploring concepts such as capillary rise, tension, and plant uptake. It evaluates your understanding of how water moves through so...

Questions: 15 | Attempts: 10 | Last updated: Mar 23, 2026

Sample Question
What is water potential in soils and what does it measure?

Water potential measures the total volume of water stored in a soil sample expressed as milliliters per kilogram of dry soil

Water potential is a measure of the free energy of water in the soil expressed in pressure units such as megapascals, describing the tendency of water to move from regions of higher to lower water potential

Water potential measures the electrical conductivity of soil water used to detect salinity levels harmful to plant roots

Water potential measures the temperature of soil water used to estimate evapotranspiration rates from irrigated fields

All Soil Physics Quizzes

Soil Biology Quizzes

What do you know about worms? Trivia Quiz

Though worms are minute, they play a great role in the ecosystem. Earthworms, for instance, break down organic matters which of benefits to plants. It also determines the amount of...

Questions: 10 | Attempts: 332 | Last updated: Mar 19, 2025

Sample Question
What happens when worms are exposed to too much light?

It burns their skin

Their body is warm

They become paralyzed

They stop processing their food

A Short Quiz Based on Various Biological Systems!

Answer all questions according to what we read in the textbook.

Questions: 17 | Attempts: 76 | Last updated: Jun 22, 2025

Sample Question
Where is the "O layer" or the "O horizon" located in soil?

Top layer

Middle layer

Bottom layer

Soil Food Web Quiz: The Hidden World Beneath Your Feet

This assessment explores the intricate soil food web, evaluating your understanding of the diverse organisms and their roles in nutrient cycling. By engaging with this material, yo...

Questions: 15 | Attempts: 15 | Last updated: Mar 23, 2026

Sample Question
What is the soil food web?

A network of roots from different plant species that share nutrients underground

A system of interconnected feeding relationships among organisms that live in and depend on soil

A layer of minerals and clay particles that form the base of the soil profile

A web of underground tunnels created by burrowing animals

All Soil Biology Quizzes

Soil Erosion Quizzes

Roots of Stability: Erosion Control Quiz

Nature’s anchors for the earth. Plants use their roots like a net to hold the soil in place and their leaves like an umbrella to soften the rain. This erosion control quiz ex...

Questions: 20 | Attempts: 22 | Last updated: Mar 09, 2026

Sample Question
Which part of a plant acts like a "net" to hold soil particles together?

Leaves

Flowers

Roots

Seeds

Ice, Wind, and Water: Agents of Erosion Quiz

The "delivery drivers" of the geosphere. Gravity provides the pull, but it's the moving water, howling wind, and creeping glaciers that do the heavy lifting. This age...

Questions: 20 | Attempts: 13 | Last updated: Mar 09, 2026

Sample Question
Which agent of erosion is responsible for carving out deep V-shaped valleys over millions of years?

Wind

Ice

Moving Water

Gravity

The Triple Threat: Weathering Erosion Deposition Quiz

The three-step process of landscape change. First, you break it; then, you move it; finally, you drop it. This weathering erosion deposition quiz helps you distinguish between thes...

Questions: 20 | Attempts: 13 | Last updated: Mar 09, 2026

Sample Question
What is the primary difference between weathering and erosion?

Weathering breaks rock down; erosion moves it.

Weathering moves rock; erosion breaks it down.

Weathering only happens with water; erosion only with wind.

There is no difference between them.

All Soil Erosion Quizzes

Soil Conservation Quizzes

Future Harvests: Sustainable Farming Practices Quiz

Explore the intersection of biology and long-term agriculture in this sustainable farming practices quiz. Learn how techniques like crop rotation and cover cropping naturally reple...

Questions: 15 | Attempts: 13 | Last updated: Mar 09, 2026

Sample Question
How does the implementation of crop rotation primarily protect the chemical integrity of the geosphere?

By increasing the use of heavy plows

By preventing the depletion of specific minerals

By reducing the amount of natural sunlight

By eliminating the need for any water

Stripping the Land: Deforestation Effects on Soil Quiz

Analyze the hidden consequences of large-scale land clearing in this deforestation effects on soil quiz. Understand how removing tree cover leads to rapid nutrient leaching, increa...

Questions: 15 | Attempts: 11 | Last updated: Mar 09, 2026

Sample Question
What is the primary role of a forest canopy in protecting the ground from physical degradation?

Increasing surface wind speed

Absorbing the kinetic energy of rainfall

Decreasing the amount of oxygen

Accelerating the rate of evaporation

Salty Ground: Soil Salinization Explained Quiz

Investigate the chemical challenges of farming in arid environments in this soil salinization explained quiz. Study how improper irrigation leads to salt buildup that stunts plant ...

Questions: 15 | Attempts: 11 | Last updated: Mar 09, 2026

Sample Question
What is the primary physical process that leads to the accumulation of salts at the surface in arid regions?

Sublimation

Evaporation

Condensation

Precipitation

All Soil Conservation Quizzes

Top Trending Soil Science Quizzes

Soils Special Inspection Test Questions

Who would say that at some point we would be able to test different types of soils for our own good. Take up the quiz below on soils special inspection and see how it goes. All the best.

Questions: 45 | Attempts: 11006 | Last updated: Oct 23, 2025

Sample Question
You have just finished an in-place density test that resulted in a failing test, who should you contact first?

Building Official

Engineer of Record

Contractor

Architect

Different Types Of Soils Quiz

Welcome to our Different Types of Soils Quiz, designed to test your understanding of various soil types. This quiz is essential for anyone looking to deepen their knowledge of the soil beneath our feet, which is crucial for...

Questions: 10 | Attempts: 366 | Last updated: Oct 4, 2025

Sample Question
Which soil type is rich in nutrients and organic matter?

Sandy soil

Loamy soil

Clay soil

Chalky soil

A Quiz On Soil Properties! Trivia

Do you have enough knowledge about soil properties to pass this quiz? Soil is a mixture of organic material, minerals, gases, liquids, and organisms. The following properties of soil are taken into consideration while dealing...

Questions: 10 | Attempts: 2148 | Last updated: Oct 7, 2025

Sample Question
What is soil?

A mixture of mineral, humus air and water on Earth's Surface

To protect or save natural resources and use them wisely

Tp breal down dad plant or animal material

Soil Lab Reviewer-quiz For Finals

1. For questions having 2 or more answers, please use "comma-space" for separating each answersExample: stable, unstable2. Answers are "space" and "dash" sensitive.3. Wrong spelling and incomplete...

Questions: 90 | Attempts: 220 | Last updated: Mar 19, 2025

Sample Question
What is the formula of Moisture Content?

Ws/Ww

Ww/Ws

Vs/Vw

Vw/Vs

Soil Health Quiz 1

10 fun and interesting true/false questions about healthy soil.

Questions: 10 | Attempts: 9322 | Last updated: Oct 4, 2025

Sample Question
Regular tillage/plowing helps keep open pores at the soil’s surface and increases water infiltration into the soil.

True

False

Recent Soil Science Quizzes

Understanding Edaphic Factors in Soil Science

Questions: 25 | Attempts: 10 | Last updated: Apr 28, 2026

Sample Question
What is the definition of soil?

A thick layer of the earth's crust

A thin layer of the earth's crust that acts as a natural substrate for plant development

A mixture of rocks and minerals

A type of rock formation

Understanding Soil and Vegetation in Cold Regions

Questions: 10 | Attempts: 10 | Last updated: Mar 24, 2026

Sample Question
What is permafrost?

Soil that remains above 0 degrees Celsius

Ground that remains below 0 degrees Celsius for at least 2 years

A type of vegetation found in cold regions

A layer of soil rich in nutrients

Understanding Soil: Composition, Structure, and Ecological Importance

Questions: 16 | Attempts: 28 | Last updated: Aug 4, 2025

Sample Question
What is soil?

A type of fertilizer used to promote plant growth.

A form of sand found near a body of water.

The layer of grass on the surface of the ground.

A loose mixture of rock fragments, organic material, water, and air that can support the growth of begetation

Advanced Concepts in Agriculture and Farming

Questions: 5 | Attempts: 15 | Last updated: Aug 4, 2025

Sample Question
Distinguish between plantation and shifting agriculture.

Shifting agriculture: it is the process of agriculture in which a small area of a forest is cleared by cutting down all the trees and the area is banned.the ashes are mixed with the soil to make it more fertile for the crops to grow.when the land becomes less fertile it is abandoned.this practice is known as slash and burn agriculture.these regions are generally with heavy rainfall plantation agriculture:in this cultivation vast lands are brought under a single crop.large amounts of chep but skilled labour,scientific technique,transport network and marketing skills are employed.the farm produced are either processed in their factories or are sold as raw material to other industries.some of the farm produce is exported too

Shifting agriculture is commonly practiced in regions with minimal rainfall.

Shifting agriculture involves cultivating crops on large plantations only.

Plantation agriculture focuses on small-scale farming with diverse crops.

Fundamentals of Soil Science

Questions: 18 | Attempts: 17 | Last updated: Aug 4, 2025

Sample Question
Why is soil important?

3. Nutrients can cycle without the presence of soil

1. Crucial to food and fiber supply 2. Critical to clean drinking water (soils filter water physically and via bacteria - ie. septic) 3. Necessary for nutrient cycling 4. Needed for organic waste decay (for plants to have nutrition, they have to be able to break down waste) 5. Needed to prevent flooding

1. Soil is only important for planting flowers

2. Soil has no impact on water quality

Soil Respiration Quiz: Ecosystem Processes

Questions: 12 | Attempts: 13 | Last updated: Feb 17, 2026

Sample Question
What process involves the replacement of one positive ion in soil by another?

Electrolysis

Cation exchange

Decomposition

Anion exchange

How Well Do You Know World Soil Day?

Questions: 15 | Attempts: 280 | Last updated: Oct 4, 2025

Sample Question
When is World Soil Day celebrated annually?

December 1

November 15

December 5

January 10

8th Grade Trivia Facts On Earth Science! Quiz

Questions: 10 | Attempts: 193 | Last updated: Oct 22, 2025

Sample Question
On many islands and in some nature reserves, goats are being removed and banned. How does removing goats and similar grazing animals reduce soil erosion?

Goats tend to move around a lot, stirring up soil and leaving it open to erosion

Goats will often overgraze areas and remove all vegetation, leaving bare earth

The excess organic matter from the goats' droppings leads to pockets of rapid plant growth

Goats discourage other animals that may help the plants to grow

Soil Percolation Lab Quiz: Trivia!

Questions: 21 | Attempts: 200 | Last updated: Mar 20, 2025

Sample Question
Which type of barrier island substrate allows: Water to consistently pass through the quickest without absorbing the water?

Coarse sand

Clay

Fine sand

Silt

Loam/peat

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