List three indicators of harvest readiness for a major cereal crop and one postharvest handling precaution.

• A. Leaf color, stem thickness, and root depth; store grain at high moisture to prevent brittleness.
• B. Kernel shape, plant height, and panicle length; harvest at any moisture.
• C. Grain moisture content, kernel hardness, and head maturity; harvest at appropriate moisture to minimize spoilage and drying costs.
• D. Flowering time, tiller count, and leaf width; dry grain after harvest.

Answer: (C)

Harvest readiness hinges on grain maturity indicators that show the grain has finished filling and can be stored safely. The best trio to watch is grain moisture content, kernel hardness, and head maturity. Grain moisture content tells you how much water remains in the kernel; when moisture is near the crop’s target for safe storage, drying costs and spoilage risk are reduced. Kernel hardness reflects the grain’s integrity and dryness—harder, firmer kernels indicate the grain has dried enough to resist damage and storage pests. Head maturity signals that the grain inside the heads has fully developed and the grain is transitioning toward safe storage moisture levels.

For postharvest handling, the precaution is to harvest at the appropriate moisture to minimize spoilage and drying costs. Harvesting too wet invites mold, heating, and rapid spoilage, which forces costly and energy-intensive drying. Harvesting too dry can increase losses from shattering and handling damage. Hitting the right moisture balance helps preserve quality and reduces the amount of drying needed after harvest.