| Introduction |
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- Photopedogenesis: Appearing in 18th World Congress of Soil Science.
- Use of X-rays in promoting soil fertility.
- Fluvisol in Soil Taxonomy (USDA): appeared in 15th World Congress of Soil Science.
- Immobisol in World Reference base (WRB): Appearing in18th World Congress of Soil Science.
- Waste mica as a source of low grade K-source to plant.
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