noun
superphosphate fertilizer
Technical agricultural term for a phosphate fertilizer produced by treating rock phosphate with sulfuric acid.
過燐酸肥料はリン酸を多く含むため、根の発育を促進する。
Superphosphate fertilizer contains a lot of phosphoric acid, so it promotes root development.
Compound of 過燐酸 (superphosphate) and 肥料 (fertilizer). The exact historical derivation is uncertain; the spelling is conventionally associated with the chemical process.