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 cmolc kg−1, magnesium (Mg) 1.0 cmolc kg−1, H+Al 3.2 cmolc kg−1, acidity saturation 40.4%, cation exchange capacity (CEC) 8.9 cmolc kg−1, base saturation 63.1%, Ca saturation 45.7%, Mg saturation 18.0%, and Potassium (K) saturation 2.9.
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.