How Nutrition Are Replenished In The Soil

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Soil nutrition plays a crucial role in the growth and development of plants. It provides essential elements that plants need to thrive. But have you ever wondered how the soil replenishes its nutrients? In this article, we will explore the processes through which nutrition is replenished in the soil and the factors that contribute to its availability for plants.

Natural Processes

One of the primary ways nutrition is replenished in the soil is through natural processes. These processes include weathering of rocks, organic matter decomposition, and microbial activity.

NCERT CBSE Class Science Chapter Nutrition In Plants Part
NCERT CBSE Class Science Chapter Nutrition In Plants Part

Weathering of rocks releases mineral particles into the soil. Over time, the minerals break down and release essential nutrients, such as nitrogen, phosphorus, and potassium. Rainfall and temperature fluctuations contribute to the overall weathering process.

Organic matter decomposition also plays a vital role in replenishing soil nutrition. As plants and animals die, their remains decompose and become part of the soil. This decomposition process releases nutrients that were stored in the organic matter, enriching the soil with nitrogen, carbon, and other essential elements.

Microbial activity is another crucial factor in soil nutrition replenishment. Soil microorganisms break down organic matter and convert it into forms that plants can easily absorb. They also play a role in fixing atmospheric nitrogen, making it available for plant uptake.

Fertilizer Application

While natural processes contribute significantly to soil nutrition replenishment, human intervention through fertilizer application is also essential. Fertilizers are substances that contain specific nutrients needed by plants. They are applied to the soil to supplement its nutrient content and ensure optimal plant growth.

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Fertilizers can be classified into two main types: organic and inorganic. Organic fertilizers are derived from natural sources, such as animal manure, compost, and bone meal. They release nutrients slowly over time, providing a steady supply to the soil. Inorganic fertilizers, on the other hand, are chemically synthesized and provide an immediate nutrient boost to the plants.

When fertilizers are applied to the soil, their nutrients dissolve in water and are absorbed by the plant roots. These nutrients are then utilized by the plants for various physiological processes, such as photosynthesis, growth, and reproduction.

Crop Rotation

Crop rotation is a farming practice that involves growing different crops in sequential seasons on the same piece of land. This practice helps replenish soil nutrition in several ways.

Firstly, different crops have different nutrient requirements. By rotating crops, the nutrient demands of one crop can be balanced by the nutrient availability left behind by the previous crop. This ensures that the soil does not become depleted of specific nutrients.

Secondly, certain crops have the ability to fix atmospheric nitrogen. Leguminous plants, such as beans and peas, have nodules on their roots that house nitrogen-fixing bacteria. These bacteria convert atmospheric nitrogen into a form that plants can use, thus replenishing the soil with this essential nutrient.


The replenishment of nutrition in the soil is a complex process influenced by natural processes, fertilizer application, and crop rotation. Weathering of rocks, organic matter decomposition, and microbial activity contribute to the natural replenishment of nutrients. Fertilizer application supplements the soil’s nutrient content, while crop rotation helps balance nutrient demands and replenish specific nutrients. By understanding these processes, farmers and gardeners can ensure the fertility of their soil, leading to healthier and more productive plants.

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