About NAKAMARU Yasuo M.
About Tokyo Univ. Agriculture
About KOKIDO Yusuke
About HOKUREN Federation of Agricultural Cooperatives, Hokkaido, JPN
About SASADA Marina
About Tokyo Univ. Agriculture
About TAKADA Chinatsu
About Tohoku Univ., Sendai City, JPN
About ALTANSUVD Javkhlantuya
About Tokyo Univ. Agriculture
About KASAJIMA Shinya
About Tokyo Univ. Agriculture
About ITO Hirotake
About Tokyo Univ. Agriculture
About YOSHIDA Hozumi
About Tokyo Univ. Agriculture
About 東京農業大学農学集報
About fertilization(cultivation)
About potassium
About agricultural district
About Hokkaido
About farm land
About crop yield
About field experiment
About rotation cropping
About phosphorus
About soil component
About phosphorus fertilization
About available phosphorus
About over-fertilization
About reduction of fertilizer application
About agricultural area
About farmland
About rotation
About Soil fertility
About Tubers(=corms)
About 北海道
About 堆肥
About リン
About カリウム
About 施肥
About 作物収量
About 土壌