10:45 〜 12:15 [AGE27-P02] Comparison of chemical and biological properties of soils between conventional or eco-friendly farming methods for Japanese pear cultivation *甲斐 貴光1、岩﨑 泰永1、武田 甲1、杉原 敏昭1、梅田 大樹2、川越 義則2 (1.明治大学、2.日本大学)