PROBLEM TO BE SOLVED: To provide a bag filled with lapilli and efficiently improving weeding, moisture retaining operation and environmental improvement (soil, etc.) even in a place where weeds easily grow or moisture retention is difficult by less time and labor than those of a conventional bag. SOLUTION: The bag is obtained by filling the stretchable bag with the lapilli. Thereby, the bag can be installed at the objective place in a free form to some extent. When a removable wire rope is inserted, each fastened bag can be connected and fixed installation and removal are facilitated. Stable installation can be carried out even on a slope. A nutritious liquid, a chemical fluid, etc., are preferably adsorbed on the lapilli to thereby contribute to a further improvement in problems. COPYRIGHT: (C)2006,JPO&NCIPI
