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Conservation agriculture (CA) is a sustainable agricultural management practice that aims to improve and sustain agricultural productivity, increase profits, and protect the environment. It plays a vital role in the agriculture and allied sector, particularly in enhancing soil health, reducing input costs, and mitigating the effects of climate change. Conservation agriculture is based on three key principles: minimal soil disturbance, permanent soil cover, and crop rotation. These principles are supported by a range of objectives that focus on ecological, economic, and social sustainability. Principles of Conservation Agriculture 1. Minimal Mechanical Soil Disturbance: This principle is grounded in the idea that soil should be disturbed as little as possible. The practice of zero-tillage or no-tillage reduces the physical disruption of soil. Tillage alters the natural structure of soil, affecting its organic matter content, microbial life, and water retention. Conservation agriculture promotes direct sowing of seeds into unplowed soil, often using specialized equipment. This helps preserve soil structure, reduces erosion, minimizes oxidation of organic matter, and encourages the proliferation of beneficial organisms such as earthworms. 2. Permanent Organic Soil Cover: The soil surface should be covered with crop residues or living plants throughout the year. This mulch layer serves multiple functions: it protects the soil from the impact of raindrops, reduces evaporation, regulates temperature, suppresses weed growth, and contributes organic matter to the soil as it decomposes. In rainfed areas, this is crucial for moisture retention. In irrigated systems, it reduces the frequency of watering. Organic ________ ______ ___ __________ __________ _________ _________ __________.
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