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1. Soil composition is an important aspect of nutrient management. ... The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air.
2.any artificial embankment, dam or a barrier made of earth built across a river or stream to prevent flooding
3. Graduated terrace steps are commonly used to farm on hilly or mountainous terrain. Terraced fields decrease both erosion and surface runoff, and may be used to support growing crops that require irrigation, such as rice.
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Answer:
2. i) Soil composition refers to the nutrients and various other substances present in the soil. These are categorized into four basic categories: water, air, organic matter and minerals.
ii) Bunds are among the most common techniques used in agriculture to collect surface run-off, increase water infiltration and prevent soil erosion.
iii) Hilly region are prone to soil erosion and water scarcity. To prevent the loss of topsoil from the hills side terrace farming done. The cut terraces allow water to slow down while they flow from the upper hill towards the lower side of the hill.
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