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Soil

Soil, by definition, is a earthly compound comprised of biotic (living) and abiotic (non-living) matter that is formed in several layers over millions of years. It is the very component of the Earth that plants need to root themselves and grow in in order to feed all animal life. There are many different types of soil across the globe for each continent and biome, and each type has its characteristics that depict what plants can grow where, when, and how. Questions and answers about soil can be asked and answered here.

10,730 Questions

What factors help determine the type of soil such as how it can affect the soil in an area?

Factors such as climate, parent material, topography, organisms, and time influence soil formation and determine its type. These factors affect soil properties like texture, structure, pH, nutrient content, and organic matter, which in turn impact the soil's fertility, water retention, drainage, and ability to support plant growth. Understanding these factors is crucial for managing and improving soil quality in a particular area.

How would contour farming and no till farming prevent soil erosion?

Contour farming involves cultivating along the natural contours of the land, creating ridges that reduce water runoff and help retain soil. No-till farming avoids disturbing the soil through plowing, maintaining soil structure and organic matter. Both practices help prevent soil erosion by reducing water runoff and protecting the topsoil from being washed or blown away.

How does the bare soil face type affect the amount of runoff?

Bare soil face type increases runoff due to reduced infiltration capacity and increased surface water flow. Without vegetation to slow down water movement and promote absorption, more water runs off the surface. This can lead to increased erosion and decreased groundwater recharge.

Why surface runoff occur much more often areas with soils with a high clay content?

Surface runoff occurs more often in areas with soils high in clay content because clay has poor permeability, leading to water being unable to infiltrate into the soil. This results in increased surface runoff as the water flows over the impermeable clay layer instead of being absorbed into the ground. Additionally, clay soils have a tendency to become compacted, further reducing infiltration capacity and increasing runoff.

What is the richest soil type in organic material?

The richest soil type in organic material is generally considered to be loam soil. Loam is a balanced combination of sand, silt, and clay, providing good structure and drainage while also retaining nutrients and moisture well. This combination creates a fertile environment for plants to thrive and for organic material to decompose effectively.

What natural action flattens the surrounding land and enriches the soil?

Erosion caused by wind, water, or glaciers can flatten the surrounding land by wearing down elevated areas and depositing sediments in lower areas. Over time, this process can also enrich the soil by mixing minerals and organic materials into the terrain.

Where would gullies be more likely to form a field with plowed soil and no plants or a field covered with thick grass explain?

Gullies would be more likely to form in a field with plowed soil and no plants because the soil is more exposed and vulnerable to erosion from water flow. In contrast, a field covered with thick grass can help reduce erosion by holding the soil in place with its roots and providing protection from rainwater runoff.

What is the trade off between increasing permeability of soil and improving water holding capacity?

Increasing permeability of soil usually reduces water holding capacity because faster drainage leads to less water being retained in the soil. This trade-off can impact plant growth as plants may not have access to enough water if the soil drains too quickly. Balancing these factors is key to promoting healthy soil and plant growth.

What are ferruginious soils?

Ferruginous soils are soils that contain a high concentration of iron. These soils often have a distinctive reddish-brown color due to the presence of iron oxides such as hematite and goethite. Ferruginous soils are generally well-drained and can be fertile for certain crops, but they can also be prone to erosion.

Why are Arctic soils and desert soils similar?

Arctic soils and desert soils are similar because both environments have low moisture levels, leading to limited vegetation growth and nutrient availability. Additionally, extreme temperature fluctuations in both regions can impact soil composition and structure. The harsh conditions in these environments create challenges for plant growth and microbial activity, resulting in less organic matter accumulation and slower decomposition rates in the soils.

Which soil types do you think are the most easily eroded?

Sandy soils and loosely packed soils such as loamy soils are typically more prone to erosion compared to clay or silt soils. This is because sandy soils have large particles that do not bind well together, making them more susceptible to being carried away by wind or water erosion.

What property of soil that determines how water will soak through the ground?

Soil texture (e.g. clay, sand, silt) and soil structure (arrangement of particles) are key properties that influence how water will soak through the ground. These properties affect factors like porosity, permeability, and water retention capacity, which determine the rate and extent of water movement in soil.

Why are empty spaces in the soil important?

The spaces allow oxygen to reach organisms (such as bacteria and earthworms) living in the soil. It supports aerobic operations, and inhibits anaerobic operations such as fermentation and mold growth. It also allows water (and dissolved nutrients) to flow down to root layers, rather than forming stagnant puddles or runoff.

What soil conservation method is least used in NJ?

Terracing is a soil conservation method that is less commonly used in New Jersey compared to other methods like cover cropping or contour farming. Terracing involves creating leveled areas on hilly terrain to reduce erosion, but it may not be as practical in the flatter landscapes of New Jersey.

What is the horizon of expectation?

The horizon of expectation refers to the range of possibilities or outcomes that an individual anticipates or considers possible when making decisions or setting goals. It plays a role in shaping one's behavior and choices by influencing what is perceived as feasible or desirable in the future.

How are sand silt gravel and clay the same?

Sand, silt, gravel, and clay are similar in that they are all commonly found sediment types. They differ in particle size, with sand having the largest particles, followed by silt, then clay, and gravel having the largest particles. These sediments play crucial roles in soil composition and can impact properties like drainage and fertility.

What are the composition of loam soil?

Loam soil is a balanced mixture of sand, silt, and clay particles, typically consisting of around 40% sand, 40% silt, and 20% clay. This composition provides good drainage, moisture retention, and fertility, making it ideal for plant growth.

How would soil layer increase in thickness?

Soil layer increases in thickness primarily through the process of weathering, which breaks down rocks into smaller particles. These particles accumulate on top of the existing soil layer over time. Factors such as organic matter decomposition, root growth, and sediment deposition can also contribute to soil layer thickening.

What is soil horizons develop is a result of?

Soil horizons develop as a result of various soil-forming processes such as weathering, organic matter accumulation, leaching, and soil mixing. These processes lead to the distinct layers or horizons that make up a soil profile, each with unique characteristics and properties.

Why is parent rock important to soil?

Parent rock is important to soil formation because it provides the mineral content that eventually weathers and breaks down to form the soil. The type of parent rock also influences the texture, nutrient content, and pH of the resulting soil. Different parent rocks can produce soils with distinct characteristics that impact plant growth and ecosystem functions.

When organic matter is soil decomposes it creates a layer?

When organic matter in soil decomposes, it creates a layer called humus. Humus is a dark, organic material that improves soil fertility, structure, and water retention. It provides essential nutrients for plant growth and helps to support a healthy soil ecosystem.

Why do landscapers need to know the permeability of different types of soil?

for plants, it's a matter of stabilization and the soil helps stabilize the plant. Soils are generally made up of layers and soil quality often varies greatly from one layer to another. Before pond construction, it is important to determine the relative position of the permeable and impermeable layers. The design of a pond should be planned to avoid having a permeable layer at the bottom to prevent excessive water loss into the subsoil by seepage. I know there's lots of different types of soil but generally speaking, choose a lightweight for more fragile plants etc. I bought some planting soil that's super lightweight and works well for planting. It's not like dirt soil and is heavy and un-workable. I bought mine at Garden Delights Nursery.

During the Great Depression drought and soil erosion contributed to an environmental catastrophe referred to the Dust Bowl. Of the states listed which was MOST affected by this regional disaster?

The state that was MOST affected by the Dust Bowl during the Great Depression was Oklahoma. The combination of severe drought, agricultural practices that stripped the land of its natural vegetation, and strong winds led to massive dust storms that devastated the region. Oklahoma was at the heart of the Dust Bowl and experienced some of the worst conditions during this environmental disaster.

How does soil texture affect how much air and water the soil can hold?

Soil texture plays a key role in determining the amount of air and water held in soil. Coarse-textured soils like sandy soils have larger pore spaces, allowing for good drainage but lower water retention. Fine-textured soils like clay have smaller pore spaces, leading to higher water retention but poorer drainage. Loam soils, a mix of sand, silt, and clay, offer a balance of drainage and water retention due to their varied pore sizes.

Is type c soil the least stable soil?

No, type C soil is not the least stable soil. Type C soil is moderately cohesive and may require some engineering considerations for excavation. Type D soil is considered the least stable soil due to its lack of cohesion and tendency to flow when excavated.