PROBLEM TO BE SOLVED: To cleans the air by ionizing the air, manifest the effects to keep the roots of the lawns warm and prevent the cold weather damage in winter, and can grow the lawn having strong roots and healthy lawn grass. SOLUTION: Tourmaline mineral powder is scattered on the lawn in the golf park or on the lawn grass so that the tourmaline is eluted out on the applied areas. The scattering fertilizer material prepared by admixing lawn buds-covering soil to the tourmaline powder is scattered on the lawn of the golf course or on the lawn grass. The amount of the tourmaline to be scattered is 2,500 kg in the 10-fold dilution rate for the whole areas of the fair ways of 27 holes and the Korai greens, and 500 kg in the 10-fold dilution rate for the whole fair ways of 9 holes and the Korai greens.
