About ITO TOYOAKI
About 東北大 大学院農学研究科
About phosphoric acid
About animal waste
About compost
About recycling
About phosphate rock
About mineral resource
About phosphorus
About resource recycling
About solubility (property)
About characteristic curve
About Magnesium
About Calcium
About Zea mays
About organic fertilization
About crop yield
About solubility
About elution test
About compost of animal waste
About dry matter yield
About utilization
About reuse
About phosphorus resource
About Fertilizers in general
About Agricultural waste utilization
About Recycling of resources
About リン資源
About 家畜ふん堆肥
About 有効利用