Question

Fertilisers are____
minerals salts.​

Answer 1

The most common sources of nutrients in mineral fertilizers are nitrogen, potassium and phosphate.

Nitrogen originates from the air. ...

Potassium is sourced from old sea and lake beds formed millions of years ago. ...

Phosphate is sourced from insoluble calcium phosphate rocks – often referred to as “rock phosphate”.

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Answer 2

Answer:

$potassium \: and \: nitrogen$

$\: \: \: \: answer$

The most common sources of nutrients in mineral fertilizers are nitrogen, potassium and phosphate. Nitrogen originates from the air. The most common process in nitrogen fertilizer manufacturing is to create ammonia from a mixture of nitrogen from the air and hydrogen from natural gas.