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fertilizer
肥料
Agroecology
Circulus (theory)
Fertigation
Food and Agriculture Organization
History of organic farming
Milorganite
Leaf Color Chart
Nutrient Recovery and Reuse
Phosphogypsum
Soil defertilisation
Seaweed fertilizer

googlefertilizer
Google画像検索fertilizer
Google定義検索 fertilizer
wikipediafertilizer
weblio fertilizer
kotobank fertilizer
jisho fertilizer