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Fertile soil has lots of hurpus. Why? (CCE 2012)
Fertile soils possess lots of humus because
1. Humus is required for binding soil particles into crumbs. Crumb formation is needed for both hydration and aeration of soil,
2. Humus makes the soil porous for easy passage of roots,
3. It is source of minerals.
4. Humus contains chemicals that promote growth of plants.