1
potash is used in [field]
potash 通常作不可数名词，不加 a。
Potash is used in agriculture and industry.
钾碱用于农业和工业。
钾碱；碳酸钾
先理解核心含义，再看它在真实句子里的用法。
钾碱；碳酸钾
a potassium compound often used in agriculture and industry
Potash is used in agriculture and industry.
钾碱用于农业和工业。
木灰中水溶性部分,用于制肥皂、玻璃及作肥料,化学上为不纯的碳酸钾与钾盐混合物。
The water-soluble part of wood ash, used for making soap and glass and as a fertilizer (chemically speaking, an impure form of potassium carbonate (K2CO3) mixed with other potassium salts).
一类钾矿物,与碳酸钾用途相似,如用作肥料(如氯化钾、氢氧化钾)。
A class of potassium minerals, of similar applicability to potassium carbonate, such as being a fertilizer. (ie. potassium chloride, potassium hydroxide)
Farmers often spread potash on their fields to improve crop growth.
农民常在田里撒钾碱以促进作物生长。
The glass factory uses potash to make the glass strong and clear.
玻璃厂用钾碱使玻璃坚固透明。
Potash is a common ingredient in some soaps and detergents.
钾碱是某些肥皂和洗涤剂中的常见成分。
potash 通常作不可数名词，不加 a。
Potash is used in agriculture and industry.
钾碱用于农业和工业。
potash 本身一般不可数，但表语可接可数名词来说明类别。
Potash is a potassium compound.
钾碱是一种钾化合物。
Not this
Bananas are rich in potash.
Use this
Bananas are rich in potassium.
potash（钾碱）指含钾的化合物（如碳酸钾、氢氧化钾），不是化学元素钾本身；表示元素钾时必须用 potassium。
Not this
The farmer applied a potash to the field.
Use this
The farmer applied potash to the field.
potash 作不可数名词，泛指这种钾化合物或肥料时不能加不定冠词 a，也不需要变复数；直接用 potash 即可。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
钾肥
Farmers often apply potash fertilizer to improve crop yields.
农民常施用钾肥以提高作物产量。
氯化钾
Muriate of potash is the most commonly used potassium fertilizer.
氯化钾是最常用的钾肥。
硫酸钾
Sulfate of potash is preferred for crops that are sensitive to chloride.
对氯敏感的作物宜用硫酸钾。
钾矿
The company operates a large potash mine in Saskatchewan.
该公司在萨斯喀彻温省经营一座大型钾矿。
钾碱生产
Global potash production is concentrated in a few countries.
全球钾碱生产集中在少数几个国家。
Use potash naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“罐（pot）里的灰（ash）”：罐中灰烬就是钾碱 potash。此联想仅供记忆，不表示词源。
语域：neutral 常见场景：agriculture、chemistry、industry potash 多用于农业、化工等行业语境，通常指钾碱或碳酸钾；日常口语中较少单独使用，正式文件和教材中比较常见。
None of these is a true rhyme with potash /ˈpɔtæʃ/: its stressed syllable is the first one, pot-, not the -ash ending. All listed words share the spelling pattern -ash and the final /æʃ/ sound, so they are lookalikes, not rhymes.
Dictionary facts from ECDICT, WIKTIONARY.