Which outcome primarily limited Bronze Age Mesopotamian agricultural tool production, given available tin sources?

💡 Explanation

When adding tin to copper, excessive impurity inclusions arise from smelting practices which cause brittleness because impurity sites facilitate crack propagation during impact loading, reducing tool edge durability. Therefore edges are brittle during harvesting, rather than insufficient strength, high fatigue rates, or impacted hardness which would cause different break modes under different loading geometries.

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