The correct option is Ragi is a crop of wet regions and requires heavy rainfall and alluvial soil..
Explanation
Millets, also known as coarse grains, are important food crops in India, particularly suited for rain-fed and dryland agriculture. The primary millets grown in India are Jowar, Bajra, and Ragi.
Statement-wise Analysis:
- Statement Ragi is a crop of wet regions and requires heavy rainfall and alluvial soil. is Incorrect: Ragi is a crop of dry regions, not wet regions. It grows well on red, black, sandy, loamy, and shallow black soils. It does not require heavy rainfall or alluvial soil; instead, it is a drought-hardy crop suited for regions with lower precipitation.
- Statement Jowar, bajra and ragi are known as coarse grains but have high nutritional value. is Correct: Jowar, Bajra, and Ragi are classified as coarse grains but are recognized for their high nutritional value. Ragi, for instance, is rich in iron, calcium, other micronutrients, and roughage.
- Statement Jowar is the third most important food crop with respect to area and production. is Correct: Jowar is the third most important food crop in India in terms of area and production, following Rice and Wheat. It is predominantly a rain-fed crop grown in moist areas that require minimal irrigation.
- Statement Bajra grows well on sandy soils and shallow black soil. is Correct: Bajra thrives on sandy soils and shallow black soil. It is extensively cultivated in states like Rajasthan, Uttar Pradesh, Maharashtra, and Gujarat.
Key Takeaway: Ragi is distinctively a dryland crop adaptable to various soil types (red, black, sandy) and does not require the heavy rainfall or alluvial soil conditions associated with wet region crops like Rice.