EZAKI, Tsugio and FUJIHISA, Masafumi: Revegetation on the face of slopes (1)-Sediment yield during the period of 10 years and invading rate of indigenous species at the expermental banking slopes-.
In order to obtain the fundamental data for discussing about a method of turf work of the present, to investigate mainly from the ecosystem viewpoint about plant succession of the face of slopes in the temperate zone, authors investigated the sediment yield during the period of 10 years and the vegetation of the tenth year at the experimental banking slopes in the Komenono Forest Research Center, the University Forest of Ehime University. Sediment yield of turf work plots stopped on the second year, but the one of control plots was observed even in the tenth year. Invading plants were influenced by the environmemt. As for the invading herbaceous plants, 73.3% atMiscanthus sinensis Artemisia princeps, andErigeron bonariensisand as for the invading woody plants, 81.5% atCryptomeria japonicaoccupied.
Invading plants species were 7-11 species on the coarse-grained decomposed granite (Onmasa soil), 7-12 species on the fine-grained decomposed granite (Menmasa soil) and 7-13 species on the red soil, and invading species increased in number at optimum soil hardness for growth. The mean annual invading rates measured by the relative dominance, namely those of indigenous species were 9.5% with a 8.1-10.0%, and those of woody species were 4.0% with a 2.5-5.6% respectively. Providing that these invading rates last hereafter, the mean period required for the natural vegetative cover of experimental banking slopes is 11 years for indigenuos species and 27 years for woody species. There was positive interrelationship between invading rates of the indigenous species and those of the woody species.

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The growth of trees planted on cutting slope which mother rock is granite was investigated. In this report the growth of three years after planting is described. The slope on object was made and planted in 1987, aimed at restoration of the forest equal with the surrounding forest. On the slope soil dressing was done in grooves cutting to the direction of slope for trees. Planted species were Pinus Thunbergii, Quercus glauca, Q. serrata, Daphniphyllum Teijsmanni, Myrica rubra, Prunus Sargentii subsp. Jamasakura, Alnus pendula, A. firma and A. hirsuta var. sibirica. The growth of deciduous species was extremely superior, and that of broad-leaved evergreen species not. However this is the natural growth according to the character of each species, this is intensified by the carelessness on the trimming of grass. This is conspicuous on Daphniphyllum T. and Myrica r. To make up forest equal with the surrounding one, the protection of these species is important. So carefull maintenace and reconsideration in selecting the species of grass is required. Nevertheless the growth of trees is excellent on the whole.

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Bottom ash (ash of coal) has been discarded as waste matter, but recently, because of its porous structure, trial use has been made of it as a soil amendment. In this paper, the characteristics of bottom ash, when used as a mendment, were examined.
It is often pointed out that one of the problems with bottom ash is high alkalinity (over pH 9). However, the high alkainity of Bottom ash could be neutralized by mixing with masa soil (pH 5.6) and peat moss (pH 3.8). Bottom ash can improve the water retentivity of masa soil ; more importantly it increased soil water to the pF 1.8 to 2.8 range where it can easily be taken up by plants. It also showed good resistance to pressure. It is assumed that bottom ash could be used as a substitute for perlite.

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Nine varieties of Pelargonium hortorum and Pelargonium Peltatum were experimentally colonal-propagated in the plug-tray, and rooting rate of these plants were investigated at 30, 40 and 50 day after cutting. Rooted plants of Pelargonium varieties were potted at 40 day after cutting, and those growth situatiom were investigated. And two P. hortorum varieties ; Redhart and Mister-ren, were potted at 30, 40 and 50 day after cutting and those growth situation were investigated.
In the seven varieties, rooting rates at 40 day after cutting reached at maximum 80%. But rooting rates at 50 day after cutting did not rise and many roots were rotted of all varieties.
The growth of two Pelargonium varieties ; Redhart and Mister-ren, were effected by difference of potting terms, and both growth situations at 40 day after cutting were good.
It was sugested that about 40 day from cutting set was the best time of potting.

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SAKAMOTO, Keiji, ISHIHARA, Shinji and CHIBA, Kyozo: Species diversity of the woods in shrine or temple precincts-A case study on the woods in shrine or temple precincts of Okayama city-
For the purpose of studying the feature of the woods in shrine or temple precincts as isolated woods, species diversity was suudied, Relationships between the number of species or Shannon's Index and precinct areas, ownerships, peripheral landuses or war damages in 1945 were examined. Precinct areas have an effect on the number of species and Shannon's Index. It was proved that the diversity increased with the increase of precinct areas. Differences by ownerships (shrine or temple) and by peripheral landuses (built-up areas, sparsely constructed areas or crop fields) have less effects on the number of species and Shannon's Index than precinct areas. However, It was thought that the value of the number of species and Shannon's Index in the temple precinct was higher than that in the shrine precinct. In shrine precincts the dominance of Cinnamomum camphora is remarkable and in temple precincts it decreases and those of the other species increases. It was also thought that the value of the number of species and Shannon's Index in large precincts or temple precincts surrounded crop fields was high. The large disturbances, war damages scarcely have an effect on the number of species and Shannon's Index.

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