The synecological investigation of weeds on tertiary acid soil at Kashii in Fukuoka Prefecture.

[摘要] 1. During the spring and summer of 1948, the synecological investigation was made by quadrate method on virgin soil, reclaimed land, rich farmland, and paddy-field at Kashii District (Fukuoka Prefecture). These places were composed of a strong acid soil originated from Tertiary. 2. Among these the following species grouped in (a) were abundant in strong acid soil and so might be called acid plants. While the species in (b) might be supposed as plants that were disagreeable with strong acidity of soil ; they were not as common on that soil though they were usually seen numerous in fertilized farm land as its indecator-plants: (a) Lespedeza striata H. A. Miscanthus sinensis Anderss. Melampyrum roseum Mxim. var. Japonicum Fr. etsav. Panicum sanginale L. Polygonum Blumei Meissn. Gnaphalium multiceps Wall. Alopecurus fubus Sm. Polygonum aviculare L. Monochoria vaginalis Presl. var. Plantaginea Solms. Lindernia angustifolia Wettst. Rotala indica var. Uliginosa. Eliocharis acicularis R. Br. (b) Eu phorbia pekinensis Rupr. Galium aparime L. Veronica polita Fr. Veronica peregrina L. Spirodela polyrhiza Schleid. Lemna paucicosta Hegelm 3. In order to quiken promote the maturing of the reclaimed land into rich farmland, cultivate of the following species as green manure or forage crop was advisable: Lespedeza striata H. et A. Panicum sanginale L. Arundinella anomala Steud. Pueraria Thumbergiana Benth. Cassia minoides L.

[学科分类] 农业科学（综合）