Read the given paragraph and answer the following questions.

India's diverse soil types are crucial to its agrarian economy, with alluvial soil being the most prominent, covering 45.6% of the country's geographical area. Characterized by its rich content of silt, sand, clay, alongside humus and lime, alluvial soil is fertile and found mainly in the northern plains and river valleys, supporting crops like wheat, rice, and sugarcane. Forest soil, accounting for 8.67%, thrives in areas with ample rainfall, varying in texture from loamy to coarse, and is found in forest regions. Black soil or 'Regur Soil', covering 16.6%, originates from volcanic rocks in the Deccan Plateau, is rich in minerals but lacks phosphorus and nitrogen, and famously supports cotton cultivation. Red soil, making up 10.6% of the area, is noted for being porous and acidic, originating from weathered crystalline rocks, and is suitable for crops like millet and tobacco. These soil types play a fundamental role in determining the agricultural output, highlighting the necessity of understanding and managing them sustainably for food security and economic stability.