Our aim was to use the domestic microwave to dry different tropical soils with an iron oxide (Fe₂O₃) content in the clay fraction, as well as to disperse them using ultrasonic energy. We used nine soils with different Fe₂O₃ content in the clay fraction (31–663 g kg⁻¹) from horizons (A-Bi-Bw) of the Inceptisols and Oxisols in Brazil. The study was separated into two experiments: 1- soil drying time modeling (classic oven methods v. domestic microwave), 2- Soil dispersion: particle size and clay dispersed in water, by ultrasound energy v. standard method (NaOH 1 N + mechanical dispersion). Data were submitted to Gompertz non-linear regression model, ANOVA, Scott Knott's test, and Pearson's correlations. The domestic microwave was efficient for eigth soils studied, being limited when the Fe₂O₃ content exceeds 50%. The optimum drying time was between 30 and 40 min. The dispersion carried out by sonification, with the energy of 127.5 Jml⁻¹, in five minutes, increased the clay content, showing greater efficiency in relation to the standard dispersion method, in soils with high Fe₂O₃ content. The use of the domestic microwave and the ultrasonic to disperse the soil allows a particle size analysis to be carried out in one hour with good precision compared to the standard method.

我们的目标是使用家用微波干燥粘土部分中含有氧化铁 (Fe ₂ O ₃ ) 的不同热带土壤，并使用超声波能量将它们分散。我们使用了来自巴西 Inceptisol 和 Oxisols 层 (A-Bi-Bw)的粘土部分 (31–663 g kg ^-1 )中具有不同 Fe ₂ O ₃含量的九种土壤。该研究分为两个实验：1-土壤干燥时间建模（经典烘箱方法诉家用微波炉），2-土壤分散：粒径和粘土分散在水中，通过超声能量v. 标准方法（NaOH 1 N + 机械分散）。将数据提交给 Gompertz 非线性回归模型、方差分析、Scott Knott 检验和 Pearson 相关性。家用微波对研究的第八种土壤有效，当 Fe ₂ O ₃含量超过 50%时受到限制。最佳干燥时间为 30 至 40 分钟。通过声波进行分散，能量为 127.5 Jml ^-1，在 5 分钟内增加了粘土含量，与标准分散方法相比，在高 Fe ₂ O _{3 的}土壤中显示出更高的效率内容。使用家用微波和超声波来分散土壤，与标准方法相比，可以在一小时内以良好的精度进行粒度分析。