The Ministry of Culture, Recreation and Sport and the Institute for Recreation and Sport (IDRD), tested techniques to determine the impact of large events on the grass of the sports arena. The tests look for, for example, reproduce a similar situation of a massive show with assistance. "The first stage of the test consisted of pruning, surveying, geotechnical engineering and agronomy of 100 square meters of turf," said District. It was also installed protective devices that distribute weight and allow photosynthesis without public contact with the grass. Then it was installed a stage and 400 graduates of the police auxiliary entered into the field, which were located on the elements of turf protection, it was obtained a density of four people per square meter, which is the density presented at massive events. The staff entered at 4:00 pm and stayed until 10:00 pm.[10]
