Liming and Copper Fertilization in Dry Bean Production on an Oxisol in No-tillage System

ABSTRACT

A field study was conducted with the objective of determining response of dry bean (Phaseolus vulgaris L.) to liming and copper (Cu) fertilization applied to an Oxisol. The lime rates used were 0, 12, and 24 Mg ha⁻¹ and Cu rates were 0, 2.5, 5, 10, 20, and 40 kg Cu ha⁻¹. Liming significantly increased common bean grain yield. Liming also significantly influenced soil chemical properties in the top (0–10 cm) as well as in the sub (10–20 cm) soil layer in favor of higher bean yield. Application of Cu did not influence yield of bean significantly. Average soil chemical properties across two soil layers (0–10 and 10–20 cm) for maximum bean yield were pH 6.4, calcium (Ca), 4.2 cmol_c kg⁻¹, magnesium (Mg) 1.0 cmol_c kg⁻¹, H+Al 3.2 cmol_c kg⁻¹, acidity saturation 40.4%, cation exchange capacity (CEC) 8.9 cmol_c kg⁻¹, base saturation 63.1%, Ca saturation 45.7%, Mg saturation 18.0%, and Potassium (K) saturation 2.9.

Keywords:

• grain yield
• nutrient-use efficiency
• Phaseolus vulgari
• soil chemical properties

Notes

¹Manganese, Zn, and Fe were extraxted with Mehlich-1 extracting solution.

**, ^NS Significant at the 1% probability level and nonsignificant, respectively. Averages within same line followed by the same letter do not differ significantly at the 5% probability level by Tukey's test.

*,**Significant at the 5% and 1% probability levels, respectively. Means followed by the same letter in the same line under different lime treatments are statistically not significant at the 5% probability level by Tukey's test.

*,**Significant at the 5% and 1% probability levels, respectively. Means followed by the same letter in the same line under different lime treatments are statistically not significant at the 5% probability level by Tukey's test. ¹ Values are averages of two crops.

*,**Significant at the 5% and 1% probability levels, respectively.¹Due to negative β₁ regression coefficient or nonsignificant R², average value of the determined soil property at harvest was considered for maximum yield. VMY, value for maximum yield.