| 摘要 |
PURPOSE:To plant trees in vacant land, by heating the surface of the land with a flamethrower, killing perennial roots and seeds, etc., of plants, combining respective herbaceous flowering plants so as to extend the flowering periods thereof over one year as much as possible and eliminating a difference both in fecundity and in plant height. CONSTITUTION:The surface of vacant land to be seeded is heated with a flamethrower to kill perennial roots and seeds, etc., of plants. Thereby herbaceous flowering plants are sowed so as to provide any thereof in the flowering periods in each of the four seasons and uniform fecundity and plant height, such as about 40cm.
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