Step 1: Understanding the Concept:
Sugarcane (*Saccharum officinarum*) is a long-duration, high-biomass cash crop.
Proper land preparation and selection of healthy, viable planting material are essential to ensure a high germination rate and strong crop establishment.
Step 2: Detailed Explanation:
Let us analyze the statements individually:
- Statement (A): Sugarcane develops a deep, extensive root system. Deep ploughing with a soil-turning plough once in three years is recommended to break up subsoil hardpans, improve aeration, and facilitate deep root penetration. (True)
- Statement (B): Sugarcane is propagated vegetatively using stem cuttings called "setts", which contain one or more viable buds. (True)
- Statement (D): While three-budded setts are common, two-budded setts are widely used in commercial planting. They provide high planting density and reduce seed cost while maintaining high germination rates. (True)
- Statement (C): Fully mature or over-mature cane is actually not suited for planting. This is because the buds on mature cane are less active, and the stalk has a lower moisture content and high sucrose (rather than glucose/nitrogen), resulting in poor germination.
Instead, young, immature canes (10-12 months old) or the upper one-third portion of the cane are preferred for seed material due to their active buds and high nitrogen content.
Therefore, statements (A), (B), and (D) are correct.
Step 3: Final Answer:
The correct option is (A), (B), and (D) only, corresponding to option (B).