First, first look at the agricultural plastic film product certificate, and at the same time pay attention to the appearance quality of batches and rolls of agricultural plastic film. Good quality agricultural plastic film is silvery-white, and the whole roll is uniform. Good agricultural plastic film, horizontal and longitudinal tensile force are better;
Second, measure the width of agricultural plastic film. Different crops, different mulching methods require different widths of mulch, too wide and too narrow will not work. In addition, it is necessary to compare the thickness of the mulch film. The thickness is directly related to the tensile load of the mulch film, so don't just consider the investment cost, but choose too thin mulch film;
Third, to calculate the amount of agricultural plastic film, do not blindly buy. The amount is based on the way you plant, open the length of the ridge, and calculate how many meters of mulch film you need for one mu.