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← HistoryWhich outcome occurred when limited volcanic rock was available preventing effective ancient terrace agriculture in Hawai'i?
A)Increased slope instability events
B)Decreased soil nutrient retention✓
C)Accelerated water runoff erosion
D)Greater dependence on rainfall
💡 Explanation
Decreased volcanic rock amendment limited nutrient input; the cation exchange capacity via weathering of available rock was reduced, and therefore nutrient retention decreased, weakening the agricultural yields; rather than leading to slope instability or runoff changes.
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