Step 1: Understanding the Concept:
Grain storage systems are classified into bulk (loose grain stored in bins, silos, or traditional structures) and bag storage systems.
Step 2: Detailed Explanation:
1. Pusa Bin, Squat Silo, Bukhari, Kothar: Designed for storing loose unbagged grain in bulk form.
2. Cover and Plinth (CAP) Storage: An outdoor bag-storage method developed by the Food Corporation of India (FCI), where bagged grain is stacked on elevated brick/concrete plinths and covered with 250-micron polyethylene sheets tied with nylon ropes.
Thus, Cover and Plinth is a bag storage practice, not a bulk storage practice.
Step 3: Final Answer:
Therefore, Cover and plinth is NOT a bulk storage practice, matching option (B).