1. Soil Environment Division, National Institute for Agro-Environmental Sciences, Kannondai 3-1-3, Tsukuba, 305-8604 Japan
2. Akita Prefectural Agricultural Experiment Station, Genpachizawa 34-1, Yuwaaikawa, Akita, 010-1231 Japan
3. Chiba Prefectural Agriculture and Forestry Research Center, Daizennocho 808, Midori-ku, Chiba, 266-0006 Japan
4. Toyama Prefectural Agriculture, Forestry and Fisheries Research Center, Yoshioka 1124-1, Toyama, 939-8153 Japan
5. Nara Prefecture Agricultural Research and Development Center, Shijocho 88, Kashihara, 634-0813 Japan
6. Shiga Prefecture Agricultural Technology Promotion Center, Azuchichodainaka 516, Omihachiman, 521-1301 Japan
7. Yamaguchi Prefectural Agriculture & Forestry General Technology Center, Ouchi Hikami 1-1-1, Yamaguchi, 753-0231 Japan
8. Kumamoto Prefectural Agricultural Research Center, Sakae 3801, Koshi, 861-1113 Japan
9. Tochigi Prefectural Agricultural Experiment Station, Kawarayacho 1080, Utsunomiya, 320-0002 Japan
10. Hyogo Prefectural Technology Center for Agriculture, Forestry and Fisheries, Minaminooka kou 1533, Befucho, Kasai, 679-0198 Japan