Fig. 2. Variation of enthalpy with time for samples with 1.50 g of Red Latosol soil, 6.0 mg of glucose, 6.0 mg of ammonium sulfate with 35% of moisture content, control (A), and variable amounts of paraquat (a): 2.00 (B); 3.00 (C); 4.00 (D), and 6.00 (E) mg; diquat (b): 1.30 (B); 2.70 (C), 5.30 (D), 6.70 (E), and 8.00 (F) mg; and phosphamidon (c): 1.20 (B); 2.30 (C), 3.50 (D), 4.70 (E), and 5.80 (F) mg at 298.15 ± 0.02 K.