Discussion
Assertion (A): Tempering between drying passes protects head rice yield.
Reason (R): Resting allows moisture gradients within the kernel to relax before they can cause fissures.
Select the correct answer from the options below.
Answer: D
Correct answer: Both A and R are true, and R is the correct explanation of A
Both statements are true and the reason gives the mechanism. During a drying pass the surface dries much faster than the centre, and it is the resulting steep gradient - with the outer layer shrinking against a wetter core - that generates the stresses which fissure the kernel.
Tempering interrupts that chain before it completes: resting without airflow lets moisture migrate outward until the kernel is more uniform, so the stress never reaches the fissuring threshold. Fewer fissures mean fewer kernels breaking in the mill, which is exactly what head rice yield measures.
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