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What effect is common in black-soil regions due to wetting-drying cycles?काली मिट्टी वाले क्षेत्रों में गीलापन-सूखापन चक्र से कौन-सा प्रभाव अधिक होता है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: Formation of cracks by shrinkage and swellingसंकुचन-प्रसार से दरारों का बनना
Clay minerals swell with water and shrink on drying. Connect this with physical weathering and soil cracks in exams.मृत्तिका खनिज पानी पाकर फैलते और सूखकर सिकुड़ते हैं। परीक्षा में यह भौतिक अपक्षय और मृदा दरारों से जोड़ें।
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