Soil

Many tropical soils are poor in nutrients due to high rainfall that leads to leaching of nutrients, rapid decomposition of organic matter, and weathering processes that remove nutrients. Additionally, the high temperatures and year-round growing seasons in tropical regions contribute to faster nutrient uptake by plants, further depleting the soil of essential nutrients over time.

Streptomyces can be found in diverse environments such as soil, water, and plant material. They are commonly found in soil due to their ability to break down organic matter and produce antibiotics. Streptomyces can also be found in marine environments and even in some animals.

1.it gives leaves for insects to eat.

2.its shelter for little insects and they can stay away from sun.

i,m sorry but i have,nt got three answers to it i only got 2 so i hope thats ok and u have 1 more answer from some1 else.

Sand is more permeable than loam. Sand has larger particles with more space between them, allowing water to flow through more easily, while loam has a mix of sand, silt, and clay particles which slows down the movement of water.

The three horizons of soil layers are the A horizon (topsoil), which is rich in organic matter and nutrients; the B horizon (subsoil), which contains minerals leached from the topsoil; and the C horizon (parent material), which is the weathered rock or sediment that the soil developed from.

Yes, soil can release carbon dioxide through processes such as microbial respiration and decomposition of organic matter. This contribution to atmospheric carbon dioxide is part of the carbon cycle.

Organic matter is matter that is from living sources, such as animal manure, leaves, grass clippings etc. As the organic matter breaks down, worms, grubs and microorganisms incorporate it into the soil.

Clay soil lacks air and water because of its fine particle size and high compaction. The small spaces between clay particles restrict the movement of air and water, leading to poor drainage and aeration. This can hinder root development and limit plant growth in clay soil.

Forests and plants prevent soil erosion by creating a dense network of roots that hold the soil in place. The leaf litter and organic matter produced by plants help to improve soil structure and reduce surface runoff, thereby decreasing erosion. Additionally, the canopy cover provided by trees helps to buffer the impact of raindrops on the soil surface, further reducing erosion.

Soil settles into layers due to the process of soil formation, where different particles and organic matter accumulate over time. Gravity causes heavier particles to settle at the bottom, forming distinct layers based on their size and composition. This layering process is known as soil horizonation and influences soil properties and fertility.

If the summer fallow practice left the soil bare of any plant materials or residue, the soil was left exposed to potential erosion. Modern conservation tillage practices have greatly reduced this possibility.

Soil and water conservation helps to prevent erosion, improve water quality, and protect wildlife habitats. It also helps to maintain soil fertility, reduce sedimentation in water bodies, and mitigate the impacts of floods and droughts. Conservation practices can lead to sustainable land use, increased agricultural productivity, and overall environmental health.

Silt benefits farmers by providing nutrients to soil, improving soil structure, and retaining moisture. It can also increase soil fertility and enhance crop productivity.

Farmers till the soil to break it up, loosen it, and prepare it for planting. Tilling helps to create a favorable environment for seeds to germinate, improves water infiltration, and helps control weeds. It also aerates the soil, allowing oxygen to reach plant roots.

Soil helps prevent erosion by binding together and stabilizing particles. The organic matter in soil also aids in water retention, reducing runoff and the likelihood of flooding. Additionally, soil acts as a natural filter, removing contaminants before they reach groundwater sources.

Topsoil is fertile because it contains organic matter, nutrients, and microorganisms that support plant growth. Organic matter provides nutrients and improves soil structure, while microorganisms help break down organic matter into forms that plants can absorb. The combination of these factors makes topsoil an ideal environment for plant roots to thrive.

Calcereous soil is soil that contains a high concentration of calcium carbonate, which comes from the weathering of limestone rocks. This type of soil tends to have a higher pH, making it alkaline. Calcareous soil is suitable for growing crops that prefer alkaline conditions, but can present challenges for plants that prefer more acidic soils.

Protecting and conserving soil is important because it is essential for growing food, sustaining biodiversity, regulating water flow, and mitigating climate change. Soil erosion, degradation, and pollution can lead to reduced crop yields, increased flooding, and loss of habitat for plant and animal species. By preserving soil health, we can ensure long-term sustainability for agriculture and natural ecosystems.

O-Horizon: leaf litter, organic material

A-Horizon: plough zone, rich in organic matter

B-Horizon: zone of clay, iron and organic matter

C-Horizon: weathering zone, little organic matter and little life

R-Horizon:unweathered parent materia

Mining and quarrying activities can cause soil erosion by stripping away vegetation which helps to stabilize soil, disrupting natural drainage patterns, and generating large amounts of waste material that can clog waterways and increase sedimentation. The exposed surfaces from mining and quarrying are more prone to erosion due to the disruption of the natural soil structure and compaction from heavy machinery.

Soil pollution is the destruction of Earth's thin layer of healthy, productive soil, where much of our food is grown. Without fertile soil, farmers could not grow enough food to support the world's people.

Healthy soil depends on bacteria, fungi, and small animals to break down wastes in the soil and release nutrients. These nutrients help plants grow. Fertilizers and pesticides can limit the ability of soil organisms to process wastes. As a result, farmers who overuse fertilizers and pesticides can destroy the soil's productivity.

A number of other human activities can also damage soil. The irrigation of soil in dry areas with poor drainage can leave water standing in fields. When this standing water evaporates, it leaves salt deposits behind, making the soil too salty for growing crops. Mining operations and smelters contaminate soil with toxic heavy metals. Many scientists believe acid rain can also reduce soil fertility.

Soil testing provides farmers with information about nutrient levels, pH, organic matter content, and the type of soil present in their fields. This information helps farmers make informed decisions about fertilizer application, crop selection, and soil management practices to optimize crop yield and health.

Without soil, most plants would not be able to grow and survive. This would ultimately disrupt the entire food chain, leading to the extinction of many species, including humans who rely on plants for food. Soil also plays a crucial role in maintaining the water cycle and storing carbon, so its absence would have far-reaching consequences on the Earth's ecosystems.

The vast majority of microorganisms that live in soil is bacteria. Soil bacteria can be classified as either heterotrophs or autotrophs depending on how they receive nutrients. Heterotrophic bacteria use organic compounds to get the necessary amount of carbon; whereas, autotrophic bacteria is able to get it from either carbon dioxide, inorganic compounds, or sunlight.

Clay soil has a high absorption rate, so it can slow down run off by retaining more water. However, if the clay becomes saturated, it can create a barrier that prevents water from infiltrating the soil, leading to increased run off and potential erosion.