ENADE Agronomia Practice Questions - ENADE Agronomia - Exame Nacional De Desempenho Dos Estudantes Exam

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When managing highly weathered Cerrado Oxisols (Latossolos) with low cation exchange capacity and high exchangeable aluminum, agronomists often compare the base saturation method with the aluminum neutralization method for liming. Under which soil chemical condition is the aluminum neutralization method specifically prioritized?

In coarse sandy soils with low organic matter where the base saturation method would excessively raise soil pH above neutral alkaline thresholds. In highly weathered soils with very low CTC (T < 4.0 cmolc/dm³) where base saturation equations might underestimate aluminum toxicity. In fertile alluvial soils exhibiting high exchangeable calcium and magnesium levels above standard saturation limits. In alkaline sodic soils where exchangeable sodium percentage exceeds 15% and requires calcium sulfate remediation.

Correct Answer:

In highly weathered soils with very low CTC (T < 4.0 cmolc/dm³) where base saturation equations might underestimate aluminum toxicity.

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