Soil samples were taken at the beginning (just after mixing) and at the end of the experiment. The samples were oven dried at 40 ◦C until constant weight and sieved at 2 mm before analysis.
Soil samples were taken at the beginning (just after mixing) and at the end of the experiment. The samples were oven dried at 40 ◦C until constant weight and sieved at 2 mm before analysis.