Which barley type is commonly associated with higher yields in malting?

The association of six-row barley with higher yields in malting can be attributed to its genetic makeup and physiological characteristics. Six-row barley has more kernels per head than two-row barley, which typically translates to a greater overall grain yield. This higher kernel count is due to the six-row barley's spike architecture, wherein it can produce more grains, making it an attractive option for farmers looking to maximize output.

In addition to yield, six-row barley also shows a slightly higher protein content, which can benefit the malting process by contributing to certain flavor profiles and brewing characteristics. While two-row barley is often favored for its quality in brewing, particularly in producing a cleaner and more refined flavor profile, it usually does not match the yield potential of six-row barley.

The other options do not align with the established agronomic data around barley yield comparisons.