@article{oai:repository.naro.go.jp:00001501,
 author = {堀, 兼明 and HORI, Kaneaki and 福永, 亜矢子 and FUKUNAGA, Ayako and 浦嶋, 泰文 and URASHIMA, Yasufumi and SUGA, Yuko and 須賀, 有子 and 池田, 順一 and IKEDA, Jumichi},
 journal = {近畿中国四国農業研究センター研究報告, BULLETIN of THE NATIONAL AGRICULTURAL RESEARCH CENTER for WESTERN REGION},
 month = {Mar},
 note = {Soil chemical characteristics of organic farming vegetable fields in the plastic film green house were investigated. All fields were not applied chemical fertilizer but only cattle or hen feces or organic fertilizer. Five fields were investigated. Soil samples were collected from plowed layer and subsoil layer. Soil chemical characteristics of organic farming fields were different from chemical fertilizer farming fields. Problems of soil management on organic farming fields were summarized as follows. 1) The effective depth of soil were 22-35 cm caused by appearance of gravelly layer except one field. 2) While pH were adequate, soil electric conductivity and exchangeable cations content were high and cation balance were not adequate on several field. Sulfate was one of the major component causing high soil electric conductivity. 3) The amount of accumulated available phosphorus and exchangeable cations were correlated with cropping period. On several fields, water soluble phosphorus was also detected on plowed layer and subsoil layer. 4) Zinc deficiency, NO_2 excess or chloride excess were detected on some fields. 5) High accumulation of available nitrogen were observed on some fields. 6) The estimation to the nitrogen input-output balance analysis showed that 30-90% of nitrogen were leached or accumulated or volatilized.},
 pages = {77--94},
 title = {有機栽培農家圃場の土壌の実態},
 volume = {1},
 year = {2002},
 yomi = {ホリ, カネアキ and フクナガ, アヤコ and ウラシマ, ヤスフミ and スガ, ユウコ and イケダ, ジュンイチ}
}