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TOEFL BNC: 27463 COCA: 33468

potash

noun
/ˈpɒtæʃ/
/ˈpɑːtæʃ/
[uncountable]
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  1. a chemical containing potassium, used to improve soil for farming and in making soap钾碱
    Word Originearly 17th cent.: from pot-ashes, from obsolete Dutch potasschen, originally obtained by leaching vegetable ashes and evaporating the solution in iron pots.
TOEFL BNC: 27463 COCA: 33468
TOEFL BNC: 27463 COCA: 33468
TOEFL BNC: 27463 COCA: 33468
potash
Soil fertility and fertilization: compost, compost, desertification...

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