Question

рассказ о значении почвы

Answer 1

Почва – это поверхностный слой земли, который покрыт растениями.Основное значение почвы в том, что напрямую она пронизана корнями растений, которым даёт все необходимые питательные вещества для роста.

Если вырыть небольшую ямку в земле и срезать её отвесно, то можно увидеть, как в верхнем слое почвы содержатся корни очень многих и различных растений. В верхнем слое всегда больше корней, другими словами его ещё называют тёмным (перегноем) слоем почвы. Более глубокие слои почвы значительно светлее (светлый слой почвы), в них меньше корней. Как правило, под почвой в основном находятся песок, глина, камни.

Answer 2

Здесь всё есть http://bio.1september.ru/article.php?ID=200601410 

Answer 3

The Importance of Soil

Soil is a vital natural resource that plays a crucial role in supporting life on Earth. It is a complex mixture of minerals, organic matter, water, air, and living organisms. Soil provides a foundation for plants to grow, serves as a habitat for countless organisms, and plays a key role in nutrient cycling and water filtration. Let's explore the significance of soil in more detail.

Soil as a Medium for Plant Growth

Soil serves as a medium for plant growth by providing physical support, nutrients, and water. The mineral particles in soil create a structure that allows plant roots to anchor themselves and access water and nutrients. Additionally, soil contains essential nutrients like nitrogen, phosphorus, and potassium that plants need for their growth and development. Organic matter in the soil, such as decomposed plant and animal material, further enriches the soil with nutrients and improves its fertility.

Soil as a Habitat for Organisms

Soil is teeming with life, hosting a diverse community of organisms. Soil serves as a habitat for various microorganisms, insects, worms, and other organisms. These organisms play critical roles in nutrient cycling, decomposition, and the formation of soil structure. For example, bacteria and fungi break down organic matter, releasing nutrients that can be taken up by plants. Earthworms and other soil-dwelling organisms help improve soil structure by burrowing and mixing organic matter with mineral particles.

Soil and Nutrient Cycling

Soil plays a vital role in nutrient cycling. Nutrients from organic matter, minerals, and atmospheric deposition are stored in the soil and made available to plants and other organisms. Soil microorganisms break down organic matter, releasing nutrients that can be taken up by plants. When plants and animals die, their remains decompose and contribute to the nutrient pool in the soil. This continuous cycling of nutrients ensures their availability for sustaining life.

Soil and Water Filtration

Soil acts as a natural filter, helping to purify water as it percolates through the soil profile. As water moves through the soil, it interacts with soil particles, organic matter, and microorganisms. This process helps remove impurities, pollutants, and excess nutrients from the water, making it cleaner and safer. Soil also plays a crucial role in regulating water flow, preventing erosion, and reducing the risk of floods by absorbing and storing water during rainfall events.

Conclusion

In conclusion, soil is a valuable and essential resource that supports life on Earth. It provides a medium for plant growth, serves as a habitat for diverse organisms, facilitates nutrient cycling, and helps purify water. Understanding the importance of soil is crucial for sustainable land management practices and ensuring the long-term health and productivity of our ecosystems.

Note: The information provided above is based on general knowledge about the importance of soil. For more specific and detailed information, it is recommended to refer to scientific publications, textbooks, or consult experts in the field of soil science.