英語・日本語の即トレ Drill: Farming & Gardening | Fertilizers
肥料の三要素 (hiryou no san-youso) 窒素・リン酸・カリウム
NPK (Nitrogen, Phosphorus and Potassium (Kalium))
Acronym for the three major plant nutrients contained in manure, compost and fertilizers: Nitrogen, Phosphorus and Potassium (Kalium).
緩効性肥料 かんこうせいひりょう)
slow-release fertilizer
エチレン
ethylene
= 説明：植物ホルモン。
How to use
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