Figure 4.
Effect of potassium humate on the number of bolls plant−1, average boll weight and the yield of seed cotton. Within the seed dressing application, the same lowercase letter (s) a, b, or c, indicates that the soil potassium humate application rates are not statistically different from each other at p < 0.05. Among the seed dressings, the same uppercase letter (s) W, X, Y or Z, showed a non-significant effect. Error bars represent the standard deviation of the mean (n = 3, three replications).