About SATO HIROKO
About 秋田県農林水技セ 畜試
About 秋田県農林水産技術センター畜産試験場研究報告
About cultivation
About domestic animal
About compost
About production technology
About rice hull
About sawdust
About fertilizer
About oxygen demand
About germination
About ammonia
About lignin
About carbon nitrogen ratio
About nitrogen
About animal waste
About composting
About culture
About oxygen consumption
About lignin
About CN ratio
About available nitrogen
About Fertilizers in general
About Soil fertility
About 耕種農家
About 家畜
About 堆肥生産