Powdered Agricultural Gypsum For Ponds What Is The Independent Variable? And Level Of Treatment? And Controlled Variables In The Following Experiment?

What is the independent variable? and level of treatment? and controlled variables in the following experiment? - powdered agricultural gypsum for ponds

Agricultural scientists have been on the effects of air pollution, sulfur dioxide, especially in soybean production in the fields adjacent to the affected pulverized coal power plants. On the basis of initial investigations it is suggested that reducing the sulfur dioxide in high concentrations in soybeans reproduction. We designed an experiment to test this hypothesis. In this experiment, 48 soybeans, beginning to produce flowers, treatment is divided into two groups and no treatment. The 24 contracts were divided into four groups of 6th A group of 6 sewage treatment plants was placed in a fumigation chamber and exposed to 0.6 ppm sulfur dioxide for 4 hours in order to stimulate the emission of sulfur dioxide in a power plant. The experiment was in the other three treatment groups repeatedly treated groups. Wastewater treatment plants are not due to the greenhouse effect. When the corn was ripening, the number of bean pods, seed number per pod and weight of pods set for each plant.