Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sato Fumio and Kato Naoto,Effects of Rice Husk Charcoal Covering on the Qualities of Lettuce Plug Seedlings under Organic Fertilization during the Cool Season,Horticultural Research (Japan),1347-2658,THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE,2010,9,4,421-426,https://cir.nii.ac.jp/crid/1390001205211468032,https://doi.org/10.2503/hrj.9.421